"Plumber" and "Plumbing" actually come from Plumbum, the Latin name for lead, as pipes used to be made from lead. Lead's symbol, Pb is short for Plumbum.

@naveensundar4765

3 жыл бұрын

woah

@jkocol

3 жыл бұрын

Plumbum sounds like a Master Plumbers ne'er-do-well assistant.

@mj2068

3 жыл бұрын

thank you

@EnderSpy358

3 жыл бұрын

@@jkocol your brain works in interesting ways

@RyanMartinezUkulelelessons

2 жыл бұрын

Same thing with plumbob. a tool that's just a lead weight with a string on it used for construction

The glass actually starts off as clear. Over time it becomes pigmented from exposure to radiation. Eventually the turn an orange hue. They are devastatingly expensive to replace, so they use them for as long as possible.

@memecat57

4 жыл бұрын

devastatingly expensive is now my phrase of the year.

@JungleLibrary

2 жыл бұрын

@Del Squared - دل تربيع devastatingly explosive

I have never been interested in chemistry until I saw these videos. I am on hour 5 now...still glued to my sofa.

@BaileyNisse

3 жыл бұрын

How many hours have you come to now?

@EnderSpy358

3 жыл бұрын

@@BaileyNisse at least 6 I think

@ZeroMass

3 жыл бұрын

Come on man, get the lead out!

The rewatchability of these videos is amazing. I love this channel

The really crazy thing about Tetraethyllead is that the guy who invented it, also invented Freon. Think about that one man invented not just one but two of the biggest public environmental hazards. Next were going to find out that he also owned a very successful chain of Asbestos factory's.

@Edward135i

9 жыл бұрын

It's also still used in racing fuels, although most major racing series have switched to ethanol. There is really no way of getting around it for aircraft the altitude that they fly at requires very high octane fuels to keep the engines from detonating, its very hard to get unleaded fuel much above 100 octane with out lead. But for our sake that's mostly small privet aircraft, and all commercial aircraft are jet power they use Kerosene basted fuel called JET-A, Kerosene is quite clean when it burns so its not as big of a deal as you might think. the important part is that millions of cars on the ground are not using leaded fuels.

@theq4602

9 жыл бұрын

Interesting fact asbestos can only hurt you If you breath in the dust caused by cutting it with a saw. I should know I work and live with my dad who is a contractor. He has had to calm people down when they learn that sheetrock (your walls of your home) has asbestos in it. As long as you don't breath in the dust your O.K.

@treatb09

9 жыл бұрын

William Seroyer through the destruction creates a need that humans are brilliant at fixing

@nolanorgel4344

7 жыл бұрын

William Seroyer, is he stil alive?

@jmchez

7 жыл бұрын

Thomas Midgeley invented leaded gasoline and freon. He contracted adult polio just like FDR and became bed ridden. However, he also invented a machine that would turn him over without him having to call his nurse. One night he turn on the machine and the ropes got loose from their pulley, wrapped around his neck and strangled him. Seriously! Thomas Midgeley, look him up.

Ah, I have a better suggestion of an alloy for making drinking water pipes: an amalgam of cadmium and thallium with a sprinkle of arsenic, antimony and lead. Such a healthy mixture! :-)

@tavjotz25-benchmarksandgam90

5 жыл бұрын

You missed mercury and berrylium

@luisp.3788

4 жыл бұрын

@hawkturkey Nice job either missing or totally ignoring the fact that the above comment was a joke.

@brennanherring9059

4 жыл бұрын

Not sure which is worse: plutonium or potassium.

@goytabr

4 жыл бұрын

@@tavjotz25-benchmarksandgam90, I didn't miss mercury. It was an amalgam, remember?

@tavjotz25-benchmarksandgam90

4 жыл бұрын

@@goytabr Oh yeah

I am left with unanswered questions regarding Zeppelins and also yellow submarines.

@HRHooChicken

8 жыл бұрын

One word - 3,4-Methylenedioxymethamphetamine.

@debopamsil6965

5 жыл бұрын

What about lysergic acid diethylamide

must be a heavy responsibility being lead chemist

@Stray___

4 жыл бұрын

Yeah, but it has lead to many advances in science ;)

@elgaen555

3 жыл бұрын

oh goodness, lol

@medexamtoolsdotcom

3 жыл бұрын

The real tough part is that all the people they work with are very dense.

@let-me-use-kanji-in-handles

3 жыл бұрын

I hope they're not toxic

@lewishillman9006

3 жыл бұрын

@@Stray___ and

This stuff is fascinating and is part of the reason why the internet is so amazing!

Professor Poliakoff: As a child i always was fascinated about elements, i always read the few things that dictionaries explain and they leave me even more answers, now as adult i really love your videos than explain a lot more. thank you!

One lead products that I've found kinda fascinating, and a story I wish they could've confirmed, is - strangely enough - chimney tops. As far as I know it's not allowed to have lead chimney tops here in Norway, but it was used before. Old houses today with stone brick roof top will have a lotta moss growth on it, but below the lead chimney tops the roof will be as good as new, because the rain over the years "drags" with it lead from the chimney top and its poison kills the moss. :P

that lead glass is cool! i didn't know it existed

A pity the professor didn't mention that lead's chemical symbol Pb stands for Plumbum, which is the Latin word for lead. He did mention it was widely used for water pipes, hence "plumber".

@alexserrano2850

8 жыл бұрын

+ant4812 True, the latin root remains in romance languages. In Spanish is called 'plomo' for example.

@TheHollowBodiesBand

7 жыл бұрын

Alex Serrano And "plomería" is, well, plumbing.

@ShadowKick32

7 жыл бұрын

French word for lead is "Plomb" and plunber is "plombier". It's easy to see where Pb comes from in the periodic table for us. However we have some trouble with nitrogen for exemple, as we call it "Azote", so we can't remember the N so well.

@Rosie6857

7 жыл бұрын

The Welsh word for lead is "plwm" which sounds like a northern English rendition of "plum".

@juliuscaesar7795

6 жыл бұрын

In italian it is called "piombo", but the plumber is.. idraulico

I wish they talked more about toxicity of lead(.)(Pb.)

@rubenelfink25

7 жыл бұрын

i hoped for it to

@Kizron_Kizronson

7 жыл бұрын

There is a website that talks all about lead toxicity, why not go visit it.

@spinn4ntier487

6 жыл бұрын

Lead is actually not very toxic unless you have chronic exposure

@rivitraven

5 жыл бұрын

Lead is only dangerous when it is in a soluble compound but lead itself as an element is not dangerous to a person. Either way you shouldn't consume a pebble size of lead due to the risk that compounds your body makes will react with it and end up poisoning you because it's then soluble.

@Silent_Shadow

5 жыл бұрын

@@Kizron_Kizronson Because nobody makes the Elements more interesting than this channel. Him describing the toxicity and why would be fascinating.

Thank you for making these magnificent videos, they are so interesting but I am getting quite tired from staying up so late watching these every day.

@ayzhatheoneandonly

5 жыл бұрын

Howdy there, 7 year old comment

Even in the 1800s, lead was still used for sweetening wine. Probably, the famous composer Ludwig van Beethoven lost his hearing and finally died from lead poisening due to his heavy wine consumption and being treated with lead "medicine".

@chrisbusenkell

4 жыл бұрын

Sounds like he came out of denial and was doing something about his problem...thats what matters most. Hope the lead medicine thing worked out for him.

@alexanderschestag3247

3 жыл бұрын

@@chrisbusenkell no, it did not. It killed him.

@alexanderschestag3247

3 жыл бұрын

@Wei Zhao what?

@bastiboyza

Жыл бұрын

@@chrisbusenkell what on earth

@ayoubbelatrous9914

11 ай бұрын

I think lead sweetener was a side effect of using lead cook wear for processing of fruits before fermentation I don't think they knew why lead pots made better wine they just liked wine made using lead pots

Excellent video series. Thanks for putting these up. Another application of leaded glass is in cathode ray tubes. Only in the funnel glass these days, it used to be in the front panel glass too to reduce X-Ray emissions. Lead oxide is used in the seal which joins the panel glass to the funnel. Thanks!

When my son was 3 years old, he got tested for toxic metals and it showed LEAD poisoning. The reference for LEAD was 3, and my son's result was 24! This is such a young child to be so heavily poisoned! We're doing IV chelation with ca-EDTA and slowly taking the lead out. He is 5 now and levels are at 11.

@shanescott4843

5 жыл бұрын

Stop feeding him lead. Just stop.

@MysteriousAsteria

4 жыл бұрын

@@shanescott4843 I am sure they didn't feed their son poison. The lead is in the environment, in some places the concentration can be high enough in food or water or air for the body to absorb. That's why lead in car fuels was banned in the first place, because it got into the environment and made people sick.

@ae4164

4 жыл бұрын

@@MysteriousAsteria List some of those places, we're curious.

great vid, i love seeing how it works and the storys with it!

I so glad to know you've been giving us the correct information about lead itself since the start. (Pb) Relieved is perhaps a better choice of words. A any rate, no credibility lost from this end, and I continue to use your channel as my personal reference point for my current understanding of lead.

Good lord, I love these videos waaaay too much. Keep them coming.

@jondonnelly4831

3 жыл бұрын

and 12 years later, still going strong!

10 years on an this is still relevant.....thats science. love you guys!

love all the info. keep up the good work. hope you guys keep going.

The glass turns brownish from the radioactivity, not from the lead. This was actually a method of glass dying in the atompunk age. You can produce quite nice brown shades, however they fade during years.

I love, love, love, love, love that block of leaded glass. I want it!

Many metal organ pipes are made from an amalgam of tin and lead, in roughly the same ratios as solder. (spotted metal) Another metal which is commonly used is a sheet of lead, with a sheet of tin layered and pressed together (Hoyt metal)

the submarine camouflaging techniques were very interesting!

Really loved your tie. It's perfect for chemistry test.

Found your channel from a link from Smarter Everyday's channel. Love your channel, too. Subbed.

TEL was also used to raise the temperature at which premature combustion occurs. So you are both right. Now, vehicles have knock sensors that adjust the fuel/air mixture in order to stave off premature combustion. For vehicles where it isn't feasible to have that as the only safeguard, a higher octane fuel is used. The problem is, the higher the octane, the less energy the fuel has. So you need a balance between the two factors there.

Many things have been done. One is to use computers with sensors to detect pre-detonation (knocking) and to modify the compression ratio on the fly, new alloys that are smoother and harder, hydraulic valve timing that uses oil to move the valves and lubricates at the same time, and positive crankcase ventilation that keeps more oil near the pistons and helps prevent piston ring blow by.

On the topic of Lead in paint, the great British artist Lucian Freud used a paint called Cremnitz White which was eventually banned for its high lead content. It was eventually banned and he had to stockpile what was left over.

I have a question. I remember as a kid i used to dismantle ropes i found laying around where i grew up. They where weighted with what i believe was led. Cause inside the core of the rope I'd find a long string with metal pellets that where quite heavy attached to that string with even spaces. I also do remember them having that white coating on them (not sure if that's the oxidation you speak of) Could this have harmed me as i quite frequently handled them as a kid, without any protective gear?

There was a B-36 bomber that was modified to carry a nuclear reactor in flight, so the cockpit was made with lots of shielding and with leaded glass windows similar to the one shown in this video. Research had to be done on what color paint to use in the cockpit so that the color balance wouldn't make the crew feel ill. Apparently too much time spent in the company of essentially monochromatic light can have ill effects.

@paulanderson79

4 жыл бұрын

That must have been a bit of a problem for flight dynamics. nuclear reactors don't actually emit ionising radiation anyway.

Last night a hypnotist convinced me I was a soft, malleable metal with an atomic number of 82. I'm easily lead.

@bradenharris2214

4 жыл бұрын

nice.

You'd still have to make a leaded glass shield for the camera, otherwise the sensor will end up with loads of dead pixels (depending on the nature and intensity of the radioactive particles). The wiring would also present barrier gaps, though that could be worked around.

What's the hybridization form of Pb(II) in Lead Acetate? And what's the magnetic property of this compound? It doesn't seem to perform like other transition metals.

Correct me if I am wrong, but I do believe tetraethyl lead is still used in some common aircraft fuels for small piston engines planes.

One of your best episodes..

Lead glass, the ULTIMATE paper weight

How chaotic it had been after the Romans consumed lead back then... O_O Nice tie, btw :P

@Desmaad Beta radiation can be electrons OR positrons. When a neutron decays to a proton, it emits an electron and an antineutrino. When a proton absorbs energy and it's converted to a neutron, it emits a positron and a neutrino.

I love him so much. I hope his videos are used in class rooms

@Hishoviper

4 жыл бұрын

Zachariah Stovall My teacher actually played a video showing empty cans of Pepsi in acids and bases. I’m confident he’s actually subbed to this channel.

@zachariahstovall1744

4 жыл бұрын

@@Hishoviper whenever he dies. I'm going to die a little inside. He's precious

What would the plack clouds in see water be when youbdive out lead fishing waights that has sat tyere for a long time? I always thought it be lead oxide. But sepose black would be some thing els. Would this rais the toxisety of fish and seefood in the aria?

when i was a kid i had this little lead statue i would always chew on, the smell and taste were so comforting!

@brandonboogers

8 жыл бұрын

>i'm >stupider >coz I can tell

@apenasmeucanal5984

8 жыл бұрын

+Anal “Negro” Avacado bonzi buddy aka demonio

@KanyeTroll

8 жыл бұрын

David Vermillion i didn't eat it, only chew it. but ya, my blood lead levels are too damn high!

WOW! That was brilliant!

The lead in gasoline stops predetonation by slowing the flame front in the fuel air mixture. The added lead is opaque to the flame front, and thus slows its progress down of further igniting the rest of the fuel air mixture. The pinging of the engine is the sound of the explosion happening too soon, while the piston is still on the upstroke, the ping is that of the explosion ramming into the upward moving piston Piston can be destroyed by this.

I found a large piece of glass that looked like that in the woods on my college campus it was maybe 120 cm by 120 cm and between 10-15 cm thick. It was laying flat was overgrown and half buried when I found it and took a ridiculous amount of effort to flip up onto it's edge. But it was yellow, just like the glass in the video. I even remember even having the thought in the back of my head that it was for radiation shielding. I would have taken and kept it but I can't drive and I couldn't reasonably move it (I'm sure it weighed much more than I do). I have no idea what it was doing there or how it even would have got there. My college was a joke and was in no way qualified to handle anything radioactive beyond installing a smoke detector, let alone anything that would need a piece of glass like that. Honestly it wouldn't surprise me if it was still there in the woods.

A very interesting and informative video.

Re the wine thing. My understanding is that if the Romans had a vat of cheap-arsed vinegary old wine they'd hang lead sheets in it so that it would be sweetened by the "Sugar of Lead" that formed on the surface and thus could command a higher price. Ka-Ching....Nothing really changes much.

@PeriodicVideos , I think the lead container is a "pig" , used for storing radioactive samples.

it depends on what you mean, like white light is all colors when split into a light spectrum, but black is all colors mixed, but not split.

Regarding the initial use of tetraethyl lead as an anti-knock (ping in the UK) additive, it was chosen over the other compound that would also work, ethanol. However, ethanol was more expensive, so glossed over the hazards of lead in the environment and pushed the name “Ethyl” instead. Nowadays, they do use ethanol instead in automotive gasoline (petrol in the UK).

Equally as exciting as lead metal are the lead compounds. Many cool chemicals are lead based. Lead iodide, lead nitrate, lead dioxide, lead tetraacetate. Cool stuff indeed!

another great ep, thx professor ;)

Thanks. I also thought, incorrectly, that a higher octane meant the fuel had more chains to break, and caused it to have more energy but slowed the reaction down.

Lead is one of my favourite elements.I have always liked very dangerous stuffs

Lead oxide was added to many ceramic glazes. It makes for a transparent and easyflowing glaze, easy to work with. This is why it might be a bad idea to put acidic food into old ceramics. And then it might not be, not all glazes contain lead. The potters also tended to get ill. A test for lead in glaze should be quite easy, but it takes some time. Lead was used for moveable type, perhaps it's most important use. It is used to lower the melting point of solder (and is now partially being replaced by other metals). And I also would like to mention that miniatures does not come from the Latin word for very small, it comes from the word minium, red lead, used to paint the miniatures in fancy manuscripts. It is said to have been used primarily as a grounding for the actual painting. The same compound was used in glazes. They say that lead can be found in ice cores from Greenland from the days of the Romans taking advantage of lead mines in Brittain.

@paulanderson79

4 жыл бұрын

Lot's of antique ceramics were uranium doped as well. Not a problem. U238 is almost completely benign in terms of radioactivity. 4.6 billion years half life tells us that it's very very very slightly radioactive. Your average domestic smoke alarm chucks out far more beta particles.

I love hearing Science from a guy who actually looks like a Mad Scientist......it just makes learning more fun!

@TLWiltman not really, elements containing large amounts of hydrogen like those you stated are great at themalizing neutrons. You need light elements with large cross sections to absorb them after they have been thermalized, elements like boron or lithium.

Please do another video on LEAD!!!!!!! Outlining how it affects the human body and the chemistry behind its toxicity!!!! That would be an AWESOME video!!!!!!!!

why when the lead is placed in front of the counter it does not block everything, background can still get through?

If Santa is watching, I would like a Periodic Table necktie .. thanks! ... ... and some new skis!

love these videos

hmmm. i wonder if lead glass is appropriate for shielding radioactive material that emits beta radiation and thus, possibly produces bremsstrahlung? could be, due to the shield not being pure lead, but rather glass and lead - or would you say it'd still be advised to use a light element, such as Al, to shield the beta emitter - and use lead glass only as a second layer of shielding?

@Ole_CornPop

3 жыл бұрын

I guess in relation a plum-bob was accidentally named after its self because most of the time in the past they were made of lead.

@TheOpticalFreak

2 жыл бұрын

Hehe, beta radiation is nor strong enough to penetrate the lead glass, and so the secondary x-radiation that is caused by the "Bremsstrahlung effect" which is actually a type of fluorescence that Occurs is even lower in electron volt energy! So I wouldn't worry about it! 😉

@TheOpticalFreak

2 жыл бұрын

And don't forget that lead glass is an amalgam off lead soda and silicate minerals, and silicon (Si) is very close to aluminium! And if you would use aluminium, than you couldn't use it as a window now could you?! 😅

there is also beta+ particles that are positrons (antimatter form of electrons (and not stuff that travels in reverse time as some idiots may say)) but because that's antimatter you don't really need anything to stop that, save lead

Do ice samples show a blanket of lead on top of a radioactive layer? Thanks for holding up that massive piece of glass and the lovely video.

This guy has one awesome head of scientific hair!

Would any dense element block radiation as well as lead? For example, gold?

We still use leaded fuel in aviation, particularly piston engines that run on avgas. It’s called 100 octane low lead or 100LL for short

The amount of knowledge is inside this mans head is just incredible

please do a videi about substances in electronic cigarettes' e-liquid

@bigpicturethinking5620

5 жыл бұрын

We get it, you vape.

What chemical was in the bottle (radioactive source)?

Very good. I like the new content.

the lead paint on submarine can someone explain how that work with chemical equations? i'm kidda confused and i'm thinking if those are redox reaction or not... thanks

hmm we use lead glass mixture lenses in my job for ppl with very high short sightedness (myopia) refractive index of about 1.9 it weighs a tonne on ur face and is soft as well so it loses alot of its scratch resistance of normal index glass lenses.

Actually, that's less than half the reason why leaded gasoline was banned, at least in the U.S. There wasn't much progress on banning leaded gasoline in the U.S. until catalytic converters started to become standard equipment on cars: leaded gasoline destroys them in short order.

@MartinWillett

10 жыл бұрын

Not quite. It was the entire reason why it was BANNED, it was not the reason why it _could_ be banned. Because catalytic convertors are wrecked by metals in the fuel there was a market opening up for unleaded fuel capable of high performance. It then became feasible to consider banning lead additives. There always was an argument to ban it because of the effects it had on the brains of growing children but when there wasn't an alternative in sight people were reluctant to acknowledge the existence of an insoluble problem, or a problem that could only be cured by not driving cars. When modern sexy cars came along with catalytic converters and the fuel became available (because rich people drive new cars and rich people never have a problem for long with buying what they want to buy) it suddenly wasn't so outlandish to suggest that we should stop using fuels which were poisoning the brains of our children. Yes! Ban lead! Get the damned poor off the roads so there's more road space for the decent people and yes let's be environmentally aware, actually let's say that's why we're doing it! If leaded fuel was banned unleaded fuel for my nice new low polluting car would soon be available everywhere, even in Pig's Knuckle Arkansas. I benefit, it gives a stimulus to industry and it is what the hippies have been demanding. That's win win win.

@MartinWillett

9 жыл бұрын

***** The effects are more obvious in America.

@MartinWillett

9 жыл бұрын

***** Your government runs the world, eh?

@MartinWillett

9 жыл бұрын

***** Well you tell them not to. Your country is a democracy, of sorts.

@MartinWillett

9 жыл бұрын

***** As I said, tell them.

In my country, tetraethyl lead is illegal for the last 10 years, but still its added to gasoline fuel for planes. I had 1 liter but i've quickly got rid of it.

haha youre right dude, it does have the elements on it. That guy is so cool, especially his hairstyle. I wish I had a teacher like him

@ayzhatheoneandonly

5 жыл бұрын

Same

Ah, yes: lead acetate, aka “sugar of lead”, which was also the active ingredient of Grecian Formula 16, to make grey hair darker. 😄 On another note, MURCURY fulminate was used for primers, but has been pretty well replaced with the apparently safer...LEAD styphnate. 😆😆

I have a question. Is it true most metals we use have lead in them to act as a catalyst to strengthen them... That doesn't make sense to me but i was speaking to someone who told me unless a metal is very pure it contains lead.... Is this true? Thank you for your help and answers!

@bcubed72

7 жыл бұрын

No. Lead doesn't strengthen anything. Until recently, brass generally contained a small amount of lead, to make it easier to machine. It was taken out (most places) for health, but honestly, it "passivates" relatively quickly in use, rendering it harmless. Thus, it's perfectly safe to drink out of a brass spigot, unless it's brand new.

Thomas Midgley, Jr. he was the person who developed tetraethyllead as the additive for gasoline and also the inventor of freon gasses. Oppenheimer said 'i am become death, destroyer of world" he was probably talking about this guy

This guy is amazing looking. Could have been in Back To The Future! But OMG! Dose he know chemistry!

That tie though. This guy is great.

It would have been interesting if professor Political had a piece of regular glass the same size as the leaded glass and weighed them separately to show the additional mass of the lead in the glass.

I'm not quite satisfied with your explanation of tetraethyllead. I originally heard that it was a valve-wear preventive, because in the past the metal used for making the valve seats was much softer, so the lead was required to protect them somehow. But after a bit of research, I found that it also increased the octane rating of gas (this was probably the main motivation for its use), which let car makers create engines with higher compression, and thus have more power and better fuel mileage.

Some people have suggested that that inventor can actually be considered the single person who has caused most deaths in the world, far surpassing any genocidal dictators and mass murderers. The most obnoxious thing about it is that he most probably knew about the health hazards, but deceived the public, for personal profit. And if that's not enough, the same guy discovered that freon could be used in refrigeration...

@CChallinor

8 жыл бұрын

+WarpRulez That would be Thomas Midgley, who also came up with early CFCs. Sadly in later life he suffered with Polio, and invented a system of pulleys etc to help him, sadly it suffered a malfunction and strangled him..

@lalaithan

8 жыл бұрын

+C Challinor Maybe karma does exist...

@WarpRulez

8 жыл бұрын

Fester Blats Leaded gasoline was invented by someone.

@Sugarsail1

8 жыл бұрын

+WarpRulez those people would be called "morons"

@jmowreader9555

7 жыл бұрын

I'll give him a small break on freon. The refrigerants it replaced were either flammable, explosive, deadly poisonous, or all three at the same time. Freon is none of those.

Wow that's cool! I never knew this about Lead :D

Can radio signals pass through lead? If os, experiments could be performed by having a camera inside the hood and an outside screen.

I remember when unleaded gas started showing up which was odd at the time when we were used to buying regular or premium leaded gas and you had to be careful not to put unleaded in your car that wasn't made for it. The smell changed as well when you were following another car and you started breathing in the fumes from their car.

@21stcenturyfossil7

3 жыл бұрын

Unleaded gas worked fine in old cars. Unleaded gas ran cleaner and didn't have the corrosive action that leaded gas did. There was a potential problem with exhaust valve seat recession at high throttle openings but, in practice, most cars are driven under half throttle nearly all the time. The makers of gasoline lead additives spread alot of misinformation so they could keep selling their product. I kept my 60s era car running into the 90s on unleaded and never had a problem. In fact, the oil stayed cleaner and the plugs and exhaust system lasted alot longer. Most engines were falling apart at 100,000 miles on leaded gas. Now, on unleaded, they usually keep going for double that mileage.

nice and very informative video. good ol' Pb :D

Thankfully, lead isn't as toxic as thallium where you have to avoid it completely though it is still a toxic element.

i wish he was my teacher of my grandfather so i can sit and listen to his stories all day

"It was during the war ......". Any anecdote prefaced in such away usually excites the expectation of a listener.

the lower left triangle here is known as the ordinary metals, though in reality most of the metals in the previous group. (13,31,49,81,113,114,115,116,50,82,83)

after lead, it was found that certain compounds in gasoline (notably the heavier hydrocarbons, such as octane) prevented premature combustion. hence why we have octane ratings nowadays

i would believe so. i mean they used to make drinking glasses out of it, and i know that in various science classes when i was younger they passed lead around in the brick forms

I always wondered why the gas pumps say "lead-free" now I know.

@AverageAlien

4 жыл бұрын

They say unleaded, not lead free. Unleaded petrol.

@jamesbizs

4 жыл бұрын

Oh young people

@AverageAlien

4 жыл бұрын

@@jamesbizs k boomer

@pizzablender

4 жыл бұрын

Wireless?

@MrRedeyedJedi

4 жыл бұрын

What did you think it meant?

I am going to forward your channel to a school for them to hopefully encourage science interest.

It deals with the wavelength of light or photons that the particular material absorbs. Leaded glass just happens to let the visible spectrum through. Whereas it will absorb radiation.