Formulas Lesson 1: Writing Formulas For Binary Ionic Compounds

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Periodic Table Link: https://docs.google.com/viewer?a=v&pid=explorer&chrome=true&srcid...

The following episode looks at writing formulas for binary ionic compounds. We look at something I like to call the "5 Step Cross Over Rule". Download this episode for free from iTunes by typing in the search window "PapaPodcasts". Mr. P

Category:

Education

Tags:

• Binary
• Chemistry
• Ionic
• metal
• non-metal
• PapaPodcasts
• science

[supplytheginger]

how do you know what to write for the superscripts?

[Papapodcasts]

@supplytheginger You need to know the charges of each atom. Use the periodic table I have provided on this video.

[Liminouse]

I don't understand the part when you take out the positive and negative charges...

[Papapodcasts]

@Liminouse It's just a step we do to be able to write the correct formula. It means we just "erase" the charge and don't include it when we write out the formula.

Mr.P

[meee2014]

very helpfull im taking chemistry right now in high school and my teacher cant explain for shit

[0MGARSH]

How do we use the periodic table to find the charges of each atom?

[CaMMieCAM1]

Thank you so much! Your'e better than my teacher!

[mikey100swim]

I HAVE A POOPY BUTT AND I NEED TOILET PAPER!!!!!!!

[mikey100swim]

ITS NOT TRUE. ITS FAAAAAAAAAAAAAAAAAAAAKE

[rader951]

thank you so much i hav exams in a couple day and i wouldve been screwed if not for this

[elvisreturns666]

I am self teaching myself chemistry from when i was at school as I did not pay attention and have no gcse's etc. I am 31 now and wish I would have paid more attention. You make it so easy by the way you explain things that if my teachers explained things that way I might have understood and wanted to learn. Teachers should have to watch your videos as part of their training!!!

[softballplyr96]

this guy needs to be my teacher! all my teacher does is sleep in class. I have exams tomorow and ive learned more from google in 3 hours than i have from her all semester long, no joke.

[conversecolors13]

how can you tell if a formula is not reactant? for example NH4 +1 + PO4 -2 <little two btw not minus

[chynaa32]

so how do you simplify an element like i dont know umm . . . . phosporus dioxide or PO(subscript 4) which has a negative 3 charge and aluminum with a plus 3 charge ?

[Zom5839]

@lamya1961 you have to know your oxidation numbers from your periodic table from the metal and non metal side

[Zom5839]

@tanho12 if its a polyatomic or a ternary the ending would be ate and if its binary than it would be ide!