http://www.ck12.org Chapter 7. Chemical Nomenclature
Practice Problems- Name the following compounds:
(a) NH 4 NO 3
(b) Na 2 Cr 2 O 7
(c) PbCO 3
(d) Mg(CH 3 COO) 2 - Write formulas for the following compounds:
(a) potassium hydrogen sulfate
(b) iron(III) oxalate
(c) sodium peroxide
(d) tin(IV) chromate
Watch a humorous video lecture about Naming Ionic Compounds from BossChemDude: http://www.youtube.com/w
atch?v=q2s8hQ5NIpE (8:30)
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Click image to the left for more content.Lesson Summary
- Inorganic chemistry is the study of chemical compounds that do not contain carbon.
- Molecular formulas show the type and number of atoms that occur in a molecule. Empirical formulas show
the atoms or ions that make up a compound in their lowest whole-number ratio. Because ionic compounds
have an extended three-dimensional structure, only empirical formulas should be used to describe them. - Atoms of the representative elements generally form monatomic ions by losing or gaining enough electrons
to attain the electron configuration of the nearest noble gas. - Most transition metals are capable of forming multiple cations with different charges. When the charge of an
ion cannot be determined by the identity of the element, Roman numerals are used in the name of the ion.
Specifying the charge of an ion in this way is referred to as the Stock system. - Ionic compounds are named by writing the name of the cation followed by the name of the anion.
- Ionic compounds are electrically neutral, so the total amount of positive charge must balance the total amount
of negative charge. The crisscross method can be used to determine the correct formulas for ionic compounds. - Some ionic compounds contain polyatomic ions. A set of parentheses is used when more than one polyatomic
ion is present in a formula.