just explained something in 5 minutes my teacher couldn't do in an hour thank you!

@stepbystepscience

4 жыл бұрын

Bummer!

@Moha-bb7xm

4 жыл бұрын

true

@jagaming2577

3 жыл бұрын

My teacher has been explaining this for 3 sessions and he just did it in 5min

Thank you so much, this video helped me on my ionic bonding and polyatomics test. I had literally no idea how to do the crossover rule.

@stepbystepscience

Жыл бұрын

So glad it helped!

You're the actual best teacher, I love these videos thank you so much.

Hope it goes well!!

thank you so much sir for this video! you're a life saver. Godbless you.

Thank you so much. I'm horrible when it comes to lectures. I'm not a auditory learner, I can't learn from lectures. I barley understood when my teacher taught this but you really helped me get it.

I love you i don't why this was so hard for me but it's simple when you taught it thank you honestly

@stepbystepscience

7 жыл бұрын

You are very welcome, thanks for watching and commenting. You can see a listing of all my videos at my website, www.stepbystepscience.com

Thank you! you are the best science teacher

Thank u so much, this really helped in regards to my upcoming chemistry exam

This video saved my life. Thank you.

@stepbystepscience

5 жыл бұрын

You are very welcome, thanks for watching and commenting.

@AKid NamedChicago, The video should be helpful for you because you can replay them as needed. Thanks for the comment.

Thank you so much sir ! Helped me out a ton !!

You are such a lifesaver! Thanks, I love chemistry, but just couldn't get my head around this :]

@stepbystepscience

Жыл бұрын

You are so welcome, happy to be of help!

This helped me for my unit test :) Thanks!

@stepbystepscience

4 жыл бұрын

Great, hope the test went or goes well.

Can you explain how to choose the correct ionic charge when solving a multivalent question?

Great video, thanks for the help!

thank you sir, you saved my life, at first i didint understood it, after i watched your video i understood it, so thank you sir.

@stepbystepscience

9 жыл бұрын

ali alansari Great that the video helped you to understand and thanks for commenting!

@DanielRodriguez-lu6ov

6 жыл бұрын

rip spelling

@grizzlygorilla5864

6 жыл бұрын

Same

Mate you’re the best, thank you

@stepbystepscience

2 жыл бұрын

No problem 👍, thank for commenting.

Thanks!! i have a midterm tomorrow this helped a lot! :)

@stepbystepscience

8 жыл бұрын

+Chantal v. Great hope the test goes well! You can see a listing of all my videos at my website,www.stepbystepscience.com

Thank you so much! Very helpful!

@stepbystepscience

4 жыл бұрын

You are very welcome and thanks for the comment

thank you for the help this will help me for tommorows final!!!:)

@stepbystepscience

9 жыл бұрын

Adrian Villalpando Great, thank you very much for commenting.

super helpful! thank you

Hey this helped a ton.... Thanks for the help.

@stepbystepscience

4 жыл бұрын

You are very welcome, thanks for the comment.

Absolute great video I missed out on a science lesson explaining this and now I am up to date. THX SO MUCH JUST EARNED A SUBSCRIBER FOR LIFE

Great video my brutha

@stepbystepscience

Жыл бұрын

So nice of you, thanks.

thanks a lot, it really helped

You saved me, thank you!!

@stepbystepscience

4 жыл бұрын

You are very welcome, happy that you found the video helpful.

Omg Thank you~ This was really helpful! Tomorrow's my chemistry quiz, wish me luck! :)

@stepbystepscience

6 жыл бұрын

Good luck on the quiz.

i have my chemistry test tomorrow and you just saved me from failing you're a gift from the gods thank you thank you thank you

@stepbystepscience

6 жыл бұрын

You are very welcome, thanks for the comment and I hope the test goes well. You can see a listing of all my videos at my website, www.stepbystepscience.com

I have a question. When we are asked for ion names, what do we have to put for cations? An assignment of mine had me write down ion symbols for both anions and cations, but they also ask for Ion Name. Idk what to put there. I know that for Anions, I should end the name with "-ide" but what about cations?

@stepbystepscience

3 жыл бұрын

It is just the name of the element with no changes. For example, sodium chloride, the sodium anion and the chloride cation. Does that help?

Thank you soooo much you just saved me from failing my test!!!! :)

Helped alot thanks :)

@stepbystepscience

3 жыл бұрын

That's great, glad it helped!

Thank You so much. How can I realize when I need to put the parenthesis ?

@stepbystepscience

7 жыл бұрын

When one of the ions is a polyatomic ion and you have more then one of them. Like in the example with the phosphate (PO4)3.....you need three PO4. You can see a listing of all my videos at my website, www.stepbystepscience.com

This helps thanks!

@stepbystepscience

2 жыл бұрын

Glad to hear it!

I have an exam in 35 mins and I'm in a lesson right now. Thanks so much.

@stepbystepscience

7 жыл бұрын

You're watching hte video in class? Cool! You can see a listing of all my videos at my website, www.stepbystepscience.com

Thank You so much I was a little confused on this at first

@stepbystepscience

5 жыл бұрын

Great that you got it figured out.

I am not exactly sure what you mean by "adding the negatives" but you always cross over the number from the charge without the sign. You can not have a negative number of atoms in a molecule or anywhere else for that matter. Hope that helps.

@sofiar3189

3 жыл бұрын

Oh I see. This helps because I was about to ask why change from negative to positive. Thank you.

Thanks for the help!

@stepbystepscience

8 жыл бұрын

+scorpionMK999 You are welcome. You can link to all my videos at my website: www.stepbystepscience.com

Very right to the point ty sir

@stepbystepscience

5 жыл бұрын

You are very welcome, thanks for commenting.

Thanks SO much!!! You explained this far better than my Chemistry teacher did. Keep up the good work. Not all heroes wear capes.

@stepbystepscience

8 жыл бұрын

+bob smith Thanks for the great comment. You can see a listing of all my videos at my website,www.stepbystepscience.com

@papadanny268

8 жыл бұрын

Thanks man, your a true lifesaver.

under what circumstances would the cross over rule be used? when writing a chemical formula? i.e.: Al + O would be Al2O3?

Yes!

Thanks so much. One question - when you have elements such as phosphate, why do you write them as PO,4?

@stepbystepscience

6 жыл бұрын

Phosphate, like sulfate, nitrate, carbonate, etc, is a polyatomic ion whose overall charge is -3 (I think). Phosphate is made from one P and three Os. Hence the formula PO4. Does that help?

@UnknowableDandelion

6 жыл бұрын

Yes, it does. Thanks!

So for Magnesium Chloride - would it be MgCl(2)

You made this look so easy. But I don't understand how you got 2 times 2, minus 1 ?

What charge does Carbon and Silicon have?

This may be a dumb question, but what conditions are needed so you can perform the cross over? My teacher gave us a quiz on the topic my class haven't studied yet (and we have to deal with it; we have no choice)

@stepbystepscience

7 жыл бұрын

The cross over rule can only be used with ionic compounds! You can see a listing of all my videos at my website, www.stepbystepscience.com

Thanks for the help, just revising for my upcoming prelims and this helped a load with my revision, thank you.

@stepbystepscience

8 жыл бұрын

+logan thomson You are very welcome...You can see a listing of all my videos at my website,www.stepbystepscience.com

This saved my life

@stepbystepscience

5 жыл бұрын

Awesome that it did.

when do you know when to use it in Synthesis Reaction?

@stepbystepscience

10 жыл бұрын

In a synthesis reaction you would use it when you are determining the ratio of the elements in the compound you are making.

So when do you use crossover? all the time or when its an ionic compound?

@stepbystepscience

9 жыл бұрын

The cross over rule is only used for ionic compounds. For covalent compound use the numerical prefixes such as; mono- = 1, di- = two, tri- = three, etc.

How is nitrate -1? Nitrogen is -3 and you said is was polyatomic. Also some info about when and why the crossover works would be helpful. When to and when not to use it..

@stepbystepscience

3 жыл бұрын

I do not know exactly but the charges for the poly-atomic ions are usually given and nitrate is -1. You can use the cross over rule for all ionic compounds that are made of two things.

what about elements that are type 2? There is no specific charge for those right?

@stepbystepscience

4 ай бұрын

Yes, there is a charge for those. If I understand what you are asking, the charge is roman numeral in the parenthesis.

@michellelopez5492

4 ай бұрын

@@stepbystepscience thank you I understand now 🙏

just wondering, what if the charge was -2 and 2, would you have 2 of each ion?

@stepbystepscience

7 жыл бұрын

Just wondering what?? If I understand your question it would still reduce to an overall ratio of 1 to 1. You can see a listing of all my videos at my website, www.stepbystepscience.com

THANK YOU

@stepbystepscience

3 жыл бұрын

Any time!

Thanks... test tomorrow morning lol

thanks man

But what about MgCl2? Mg has a charge of 2+ because it gives away 2 valence electrons to Cl. I thought it would be Mg2Cl. Instead, you crossed over to be MgCl2. Is it because there needs to be correct proportion. 1 atom of Mg can satisfy Cl's Octet when there are 2 Cl atoms? If so, I think I answered my own question. But what about when we start getting to really hard variable charged ions, can we just cross them over that way? And does this method only work on ionic bonds, not covalent?

Why is it that you can just cross over charges like that? It doesn't make sense to me. Sorry if that is a stupid question, but for example: Calcium Chloride, using this method, turns out to be CaCl2. So 1 Ca atom has a +2 charge because it GIVES AWAY two valence electrons to 1 Cl atom. However, Cl doesn't need 2 valence electrons, it only needs one to fulfill the Octet Rule. So it makes sense that you need 2 Cl atoms for 1 Ca atom in order to fulfill the Octet. (Continued question...)

are we allow to do this at all time?

@stepbystepscience

5 жыл бұрын

Basically yes, for regular binary compounds.

Is the overall charge always 0?

explained a lot test on Monday Thanks a bunch!

@stepbystepscience

8 жыл бұрын

+Lavonda ironstand Hope it went well thanks for commenting. You can see a listing of all my videos at my website, www.stepbystepscience.com

Is non-metal ionic and metal covalent?

Thanks a lot! This was very helpful!

@stepbystepscience

9 жыл бұрын

Zinger Sinh You are very welcome! Thanks for commenting.

Thanks so much @Brian Swarthout This helped so much. I never understood it in Chemistry.

@stepbystepscience

9 жыл бұрын

Romeo Chryssaphes Great, if you just go step by step it is usually pretty straight forward.

thank you so much! this helped me a ton for my test tomorrow

@stepbystepscience

10 жыл бұрын

I hope the test goes/went well. Thanks for watching.

🙂Thx

Two non-metal makes a covalent bond, a metal and a non-metal make an ionic bond!!!

like that mac were can i buy 0:53

@curtisweeding2903

5 жыл бұрын

lol, your so funny

@ethantrichilo390

5 жыл бұрын

anyone else here from school

@BasedChad

3 жыл бұрын

@@ethantrichilo390 y e s

Hello, something I never understood. Nitrate is written as NO3, at 3:33. Why is this?

@stepbystepscience

9 жыл бұрын

***** How else would you write it?

@GarethBolton

9 жыл бұрын

Brian Swarthout But what does the 3 mean exactly?

@stepbystepscience

9 жыл бұрын

The formula for Nitrate is NO3. That means it has 1 atom of nitrogen and three atoms of oxygen.

@GarethBolton

9 жыл бұрын

Brian Swarthout I see, but where does the 3 atoms of oxygen come from exactly? (This is all new to me)

@stepbystepscience

9 жыл бұрын

how about the atmosphere, it is 21% oxygen gas.

thanks

@stepbystepscience

3 жыл бұрын

You're welcome!

lifesaver

exam review anyone

@luthientinuviel101

5 жыл бұрын

yep

@emiliobernal3588

5 жыл бұрын

Oh yep

Balancing equations was the one thing that boggled my mind until now, thank you SO much this should really help for my exams!

@stepbystepscience

8 жыл бұрын

Great that you found the video helpful. You can see a listing of all my videos at my website, www.stepbystepscience.com

Does this always work?

@stepbystepscience

4 жыл бұрын

Basically yes.

When you crossed over , how come you never added their negatives?

keep up thx

@stepbystepscience

8 жыл бұрын

+Hassan Nasr I'm trying. You can see a listing of all my videos at my website, www.stepbystepscience.com

the cross over rule is used for ionic compounds, yes that is the formula for aluminum oxide.

is your name dazdog by any chance

@stepbystepscience

2 жыл бұрын

bow wow!

Palagi po bang ang charges ay 0?

But the NaNo3 equation doesn't equal to zero..It's (1*1)+(-1*3)=1-3=-2..So how is that possible..

@stepbystepscience

6 жыл бұрын

It goes like this....Na is +1 and NO3 is -1 and +1 + (-1) = 0

@k.ctripathy3462

6 жыл бұрын

what is the atomic charge for carbon..It's positive or negative.. Because there is four electrons on its second bond...

Been sat for 6 hours searching still no clue. I dont get how it moves, and it seems it ignores every rule of maths that i have l known ever

Thank you so so so much this helped me alot from failing my test for tomorrow :))

@stepbystepscience

8 жыл бұрын

I hope that the test went or goes well. You can see a listing of all my videos at my website, www.stepbystepscience.com

Im still confuse on nitrate and phosphate its not in periodic table when i find it. I fken suck

@stepbystepscience

4 жыл бұрын

Nitrate, phosphate and a few others are polyatomic ions, you will not find them on the periodic table. Either you have to memorize them or you get them in a table form your teacher. But either way they work the same way. They are treated as a single ion for the cross over rule.

@seventytwo4728

4 жыл бұрын

@@stepbystepscience thanks for the explanation im a slow learner.

why there is a 3 in NANO ? I dont understand

@stepbystepscience

9 жыл бұрын

Khmer Son Because the formula for nitrate is NO3, you either have to have the memorized or you would have to look it up.

OMG i have my science exam on monday and this helped me understand so much better than how my teacher was explaining it !! thankyou :)!!

@stepbystepscience

9 жыл бұрын

Awesome, thanks for commenting, I hope the test goes well.

What if there is 3 compounds

@stepbystepscience

6 жыл бұрын

Marcus Chung Can you give me an example?

just letting you know that you're a cool guy

@stepbystepscience

5 жыл бұрын

Thanks for commenting.

@Koolyaroo

5 жыл бұрын

@@stepbystepscience you're welcome!

My teacher is so bad at his job doesn’t even know what he’s doing and says I’m at 50% in his class. We had a pre test today and he said we are all doing bad and are going to fail the test and he doesn’t think to himself because he doesn’t know what he’s teaching. He was telling us about the cris cross method then 1 minute in he goes off task and talks about gang wars for 40 minutes

@stepbystepscience

4 жыл бұрын

Sound like it is very frustrating, hopefully the videos were helpful. Thanks for the comment.

@Hammyj02

4 жыл бұрын

Step-by-Step Science yes this video a lot and I mean a lot. A lot of my classmate were also confused and he was trying to fail everyone the teacher but I gave them this video and they also said it helped. Thank you

I got a test tmr💀

@stepbystepscience

3 ай бұрын

You got this!

You lost me at chromium phosphate why does phosphate have the number 4 next to it and how does the equation make any sense

@stepbystepscience

7 жыл бұрын

Phosphate is a polyatomic ion, its formula is PO4 and it has a charge of -3. Chromium has a charge of -2. Apply the cross over rule and you get Cr3(PO4)2. That is three chromiums and two phosphates. Does that help ?

@sridhar.v4855

6 жыл бұрын

Step-by-Step Science yes it helps

SCCCIEEENCCE THX BTW

@stepbystepscience

Жыл бұрын

Welcome!

You look like hawkeye from Avengers : D

@stepbystepscience

6 жыл бұрын

Really...

Lol I'm learning this in 7th grade

@stepbystepscience

8 жыл бұрын

That is great. You can see a listing of all my videos at my website, www.stepbystepscience.com

It should be Chromium (lll) not (ll) in you questions.

@stepbystepscience

7 жыл бұрын

Chromium as two common charges, Cr+2 and Cr+3. For this exampe I chose Cr+2. OK. You can see a listing of all my videos at my website, www.stepbystepscience.com

@thegroupcall4601

7 жыл бұрын

Step-by-Step Science oh okay thanks for clearing it up!

Hey cutie

@stepbystepscience

4 жыл бұрын

Hi

@lukester102d6

4 жыл бұрын

Step-by-Step Science You’re an absolute legend at my school.

@stepbystepscience

4 жыл бұрын

@@lukester102d6 Nice, thanks for letting me know. Where is your school? I am in Berlin, Germany.

@lukester102d6

4 жыл бұрын

Step-by-Step Science United states

Yes!

Does this always work?

@stepbystepscience

5 жыл бұрын

Always is a STRONG word, maybe not always always but probably always for what you will encounter in a basic chemistry class.

@ashisyt8734

5 жыл бұрын

@@stepbystepscience thanks man you saved my sleeping hours you are real life saver!!