Chemistry 2-10-09 Chemical Names & Formulas, Part 1
CHEMISTRY: Hey guys, here’s the lecture from Tuesday on writing names and formulas for ionic compounds. It’s alot, but you can do it! Be careful!! Have your notes beside you as you get started so you can remember all the little pesky rules. And keep practicing! 
February 10th, 2009 at 10:38 PM
Hey i dont understand which number goes on the top and which goes on the bottom when doing an ionic compound!!
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February 11th, 2009 at 9:32 AM
What does the Roman Numeral stand for?
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February 11th, 2009 at 5:20 PM
Bhale,
The Roman numeral stands for that certain elements charge :]
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February 11th, 2009 at 6:26 PM
Emma: The number on the bottom tells how many atoms of whatever the atom is right before it. The number on the top tells the overall charge of the ion. I hope I helped!
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February 11th, 2009 at 7:59 PM
what is a monotomic ion?
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Ashley Hennessee Reply:
February 11th, 2009 at 9:31 PM
How do you know something is an ionic compound?
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Macee Reply:
February 12th, 2009 at 6:05 PM
ashley, in an ionic compound, two atoms share electrons. A molecular compound shares whole units that are covalently bonded molecules.
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February 12th, 2009 at 11:14 AM
Why do we have to uses prefixes.
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February 12th, 2009 at 11:14 AM
When do we know when to use roman numerals or not?
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Katherine Robinson Reply:
February 12th, 2009 at 5:26 PM
When you’re using the stock system and the cation can have more than one charge: so all transition metals, lead, tin, and nonmetals as a cation.
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February 12th, 2009 at 11:28 AM
preston: you use either roman numerals or prefixes never both.
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February 12th, 2009 at 11:32 AM
whats the diffrence between bionary ionic compounds and bionary melecular compounds?
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February 12th, 2009 at 5:53 PM
Hey y’all! How do you know when to use prefixes?
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February 12th, 2009 at 7:34 PM
why do you only use roman numerals in the prefix system why not with the stock what is the difference
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February 13th, 2009 at 6:34 PM
why do elements have more then one charge like iron or copper
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February 13th, 2009 at 10:17 PM
Kaele Howard : First, they are “binary”, binary ionic compound is salt consisting of only two elements in which both elements are ions, a cation and an anion. Binary molecular compound forms when two nonmetallic elements are covalently bonded to each other.
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February 17th, 2009 at 4:07 PM
in what situation are we supposed to use roman numerals?
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