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Section 3: Names and Formulas for Ionic Compounds

Names and Formulas for Ionic Compounds

1.
How many ions are produced when one unit of sodium phosphate (Na3PO4) dissolves in water?
A)2
B)3
C)4
D)8
2.
What is the name given to the simplest ratio of ions in an ionic compound?
A)empirical formula
B)formula unit
C)mole
D)monatomic ion
3.
What kind of ion is iodide (I-)?
A)monatomic anion
B)polyatomic anion
C)monatomic cation
D)polyatomic cation
4.
What is the charge on a monatomic ion?
A)reduction number
B)oxidation number
C)mass number
D)Avogadro’s number
5.
Sulfate (SO42-) is a ____________.
A)monatomic anion
B)polyatomic anion
C)monatomic cation
D)polyatomic cation
6.
What is the correct name of Fe2O3?
A)iron oxide
B)iron(I) oxide
C)iron(II) oxide
D)iron(III) oxide
7.
What is the formula for ammonium bromide?
A)NH4Br
B)NH3Br
C)(NH4)2Br
D)NH4Br2
8.
Name the pair that contains an incorrect formula.
A)aluminum phosphate AlPO4
B)iron(II) sulfite FeSO3
C)silver carbonate AgCO3
D)magnesium hydroxide Mg(OH)2
9.
Which one of the following classifications of ions in the table contains an error?

HydroxideOH-monatomicanion
carbonateCO32-polyatomicanion
ammoniumNH4+polyatomiccation
magnesium Mg2+monatomiccation


A)hydroxide
B)carbonate
C)ammonium
D)magnesium
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