Flame Tests of Metals
Qualitative demonstration of how salts of various metals-sodium, lithium, potassium, calcium, strontium, barium, and copper-emit characteristic colors when burned in a flame. We can analyze the component colors by placing a 500 lines/cm diffraction film in front of the camera lens. Notice that some elements are mostly monochromatic (sodium, for example) while others emit a range of colors (calcium, etc). A slightly more quantitative analysis would incorporate a slit between the flame and the diffraction grating to make the profiles of the emissions narrower and more precise.
Thanks for watching!
Пікірлер: 26
Copper, strontium and potassium are so beautiful.
For yours convenience Li- crimson red Na - yellow K - violet Rb - red violet Cs - blue Fr - radioactive 👎😁. Hope i will get 👍.
I love this, thank you for showing me I love your videos😁
Little I know there was such diffraction grade film.
thanks again Daniel ❤
Amazing mother nature
Yes
How do you make the difference between blackbody thermal and elemental spectrum ?
@NatSciDemos
2 жыл бұрын
In general a blackbody will emit a continuous range of colors, while an excited element will emit only discrete colors. For example in the video, the glowing hot platinum wire will show up as a continuous spectrum, while the burning calcium will show up as discrete green, yellow, and red colors.
@manudehanoi
2 жыл бұрын
@@NatSciDemos thanks
🔥🔥
Can anyone please tell me what is the color of the Magnesium flame? I am finding different answers in different resources?
@AshutoshSingh-gs6bz
2 жыл бұрын
Its white if u didn't find it yet :) (I might be wrong but if i remember correctly its white)
@Plumswillow
Жыл бұрын
@@AshutoshSingh-gs6bz You are right it is white :)
👍👍👍💖👍👍👍
How, it's very interessant
Hola
Sirs, verily I do regret to tell you of this and do not wish to alarm, but I think your Ba is contaminated with Na!
@DanielRosenberg
2 жыл бұрын
Indeed. Are you noticing that sodium line in almost all of the flame tests? Sodium is a wicked efficient emitter, and a common contaminant of other salts.
@Muonium1
2 жыл бұрын
@@DanielRosenberg ya I was just messin around. Of course Bunsen and Kirchoff noticed the remarkable efficency of Na as an emitter of light some century and a half ago and I guess it's probably the reason every street on the planet was lit with sodium and not calcium or strontium light up until just a few years ago when LEDs took over...
WHY NOT TRY GOLD AND SILVER!! UGH
Why are you wearing a mask? Thought you guys were smart 🙄
@victorcotu
2 жыл бұрын
they are smart, they don't want to be accused of being pseudo-scientific nor they want to lose funding :P
@thumbs4fingers
2 жыл бұрын
@@victorcotu my bet is funding
@larrymantic2635
2 жыл бұрын
Perhaps to make sure they don’t get sick from the burning of the metals?