Binary Ionic Compounds Containing a Metal Ion With a Variable Charge
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Rules for Naming Binary Ionic Compounds Containing a Metal Ion With a Variable Charge
A binary ionic compound is composed of ions of two different elements - one of which is a metal, and the other a nonmetal. For example, iron(III) iodide, FeI3, is composed of iron ions, Fe3+ (elemental iron is a metal), and iodide ions, I- (elemental iodine is a nonmetal).
Rule 1. The positive ion (cation) is written first in the name; the negative ion (anion) is written second in the name.
Rule 2. The name of the cation is the same as the name of the (neutral metal) element from which it is derived. The charge on the cation is indicated using a Roman numeral, within parentheses, immediately following the name of the cation (e.g., Fe3+ = "iron(III)", Fe2+ = "iron(II)").
Rule 3. The anion is named by adding the suffix -ide to the root of the (nonmetal) element name (e.g., iodine = I, "iodide" = I-; sulfur = S, "sulfide" = S2-).
Note: Greek prefixes are not used to indicate the number of atoms of each element in the formula unit for the compound (e.g., FeI3 is named "iron(III) iodide" not "iron(III) triiodide").
What is the correct name for the ionic compound, CrF2?
chromic fluoride
chromium(III) difluoride
chromium(II) fluoride
krypton fluoride
fluorine(II) chromide
What is the correct name for the ionic compound, CrCl3?
chromous chloride
chromium(II) chloride
chromium(III) trichloride
chlorine(III) chromide
chromic chloride
What is the correct name for the ionic compound, Cr2O3?
chromous oxide
chromic oxide
chromium(II) oxide
dicarbon trioxide
chromium(III) trioxide
What is the correct name for the ionic compound, CoBr2?
cobalt(III) bromide
cobalt(II) dibromide
cobalt bromide
cobalt(II) bromide
cobalt(I) bromide
What is the correct name for the ionic compound, CoF3?
cobalt fluoride
cobalt(II) fluoride
cobalt(III) trifluoride
trifluoride cobaltide
cobalt(III) fluoride
What is the correct name for the ionic compound, CuCl2?
copper(I) chloride
copper(I) dichloride
cuprous chloride
cupric dichloride
cupric chloride
What is the correct name for the ionic compound, CuI?
copper(II) iodide
copper monoiodide
copper(I) iodide
monocopper(I) monoiodide
cupric iodide
What is the correct name for the ionic compound, FeBr3?
ferric bromide
iron(II) bromide
iron(III) tribromide
ferrous bromide
iron(I) bromide
What is the correct name for the ionic compound, FeI2?
ferric iodide
ferrous iodide
iron(III) iodide
iron(I) iodide
iron(II) diiodide
What is the correct name for the ionic compound, FeO?
ferric oxide
iron(III) oxide
iron(II) monoxide
iron(II) oxide
iron(I) oxide
What is the correct name for the ionic compound, PbS?
lead(IV) sulfide
leadous sulfide
lead(II) sulfide
lead sulfide
lead(I) sulfide
What is the correct name for the ionic compound, PbO2?
potassium oxide
lead oxide
lead(II) oxide
lead(IV) dioxide
lead(IV) oxide
What is the correct name for the ionic compound, Mn2O3?
manganese(II) oxide
dimanganese(III) trioxide
manganese(III) trioxide
manganese(III) oxide
magnesium(III) oxide
What is the correct name for the ionic compound, MnF3?
manganese(III) fluoride
manganese(II) fluoride
manganese(I) fluoride
magnesium(III) fluoride
fluorine(III) manganate
What is the correct name for the ionic compound, MnO2?
manganese dioxide
manganese(IV) oxide
manganese(II) oxide
manganous oxide
manganese(I) oxide
What is the correct name for the ionic compound, Hg2I2?
mercury(II) iodide
mercuric iodide
mercury(I) diiodide
mercurous diiodide
mercury(I) iodide
What is the correct name for the ionic compound, HgI2?
mercuric diiodide
mercury(I) iodide
mercuric iodide
mercury(II) diiodide
mercurous iodide
What is the correct name for the ionic compound, HgO?
mercury(II) oxide
mercurous oxide
mercury(I) oxide
mercury monoxide
mercury(II) monoxide
What is the correct name for the ionic compound, SnO2?
tin(II) oxide
stannous dioxide
stannic dioxide
tin(IV) oxide
stannous oxide
What is the correct name for the ionic compound, SnI2?
stannic iodide
tin(IV) diiodide
stannous iodide
tin(II) diiodide
tin(IV) iodide
What is the correct formula unit for the ionic compound, stannous chloride?
SnCl2
SnCl4
Sn4Cl
Sn2Cl
Sn2Cl2
What is the correct formula unit for the ionic compound, tin(IV) chloride?
SnCl2
Sn4Cl
Sn2Cl
Sn2Cl2
SnCl4
What is the correct formula unit for the ionic compound, stannous sulfide?
SnS2
SnS
SnS4
Sn2S
Sn4S2
What is the correct formula unit for the ionic compound, lead(II) chloride?
PbCl
PbCl4
LdCl2
PbCl2
Pb2Cl
What is the correct formula unit for the ionic compound, chromium(III) fluoride?
CrF2
Cr3F
CrF3
CrF
Cr2F3
What is the correct formula unit for the ionic compound, cobalt(II) chloride?
Co2Cl
CoCl
CoCl4
CoCl2
Co2Cl2
What is the correct formula unit for the ionic compound, cuprous oxide?
Cu2O
CuO
CuO2
CuO4
Cu2O2
What is the correct formula unit for the ionic compound, copper(II) sulfide?
CuS2
Cu2S
Cu2S2
CoS
CuS
What is the correct formula unit for the ionic compound, iron(II) chloride?
FeCl
FeCl2
FeCl3
InCl2
Fe2Cl
What is the correct formula unit for the ionic compound, ferric oxide?
FeO
Fe2O
Fe3O4
Fe3O2
Fe2O3
What is the correct formula unit for the ionic compound, lead(II) iodide?
PbI
PbI2
Pb2I
PbI4
Pb2I2
What is the correct formula unit for the ionic compound, manganese(II) chloride?
Mn2Cl
MnCl4
Mn2Cl2
MnCl2
MnCl
What is the correct formula unit for the ionic compound, manganese(II) sulfide?
MnS2
Mn2S
MnS
Mn2S2
MnS4
What is the correct formula unit for the ionic compound, mercury(I) chloride?
Hg2Cl2
HgCl
HgCl2
Hg2Cl
Hg2Cl4
What is the correct formula unit for the ionic compound, mercuric fluoride?
HgF
Hg2F2
HgF4
Hg2F
HgF2
The formula unit for the ionic compound, chromium(II) chloride, consists of which of the following?
1 Cr2+ ion and 1 Cl2- ion
1 Cr+ ion and 1 Cl- ion
1 Cr2- ion and 2 Cl+ ions
1 Cr2+ ion and 2 Cl- ions
1 Cr3+ ion and 3 Cl- ions
The formula unit for the ionic compound, cuprous bromide, consists of which of the following?
1 Cu2+ ion and 2 Br- ions
1 Cu+ ion and 1 Br- ion
2 Cu+ ions and 1 Br2- ion
1 Cu- ion and 1 Br+ ion
1 Cu2+ ion and 1 Br2- ion
The formula unit for the ionic compound, copper(I) sulfide, consists of which of the following?
1 Cu2+ ion and 1 S2- ion
2 Cu+ ions and 1 S2- ion
1 Cu2+ ion and 2 S- ions
1 Cu+ ion and 1 S- ion
2 Cu- ions and 1 S2+ ion
The formula unit for the ionic compound, cupric oxide, consists of which of the following?
1 Cu2+ ion and 1 O2- ion
2 Cu+ ions and 1 O2- ion
1 Cu2+ ion and 2 O- ions
1 Cu+ ion and 1 O- ion
1 Cu2- ion and 1 O2+ ion
The formula unit for the ionic compound, iron(III) fluoride, consists of which of the following?
2 Fe3+ ions and 3 F2- ions
1 Fe2+ ion and 2 F- ions
1 Fe2+ ion and 1 F2- ion
1 Fe+ ion and 1 F- ion
1 Fe3+ ion and 3 F- ions
The formula unit for the ionic compound, ferrous bromide, consists of which of the following?
1 Fe2- ion and 1 Br2+ ion
1 Fe3+ ion and 3 Br- ions
2 Fe3+ ions and 3 Br2- ions
1 Fe2+ ion and 2 Br- ions
1 Fe2+ ion and 1 Br2- ion
The formula unit for the ionic compound, iron(II) sulfide, consists of which of the following?
2 Fe3+ ions and 3 S2- ions
1 Fe2+ ion and 1 S2- ion
1 Fe2+ ion and 2 S- ions
1 Fe3+ ion and 3 S- ions
1 Fe+ ion and 1 S- ion
The formula unit for the ionic compound, lead(II) fluoride, consists of which of the following?
2 Pb+ ions and 1 F2- ion
1 Pb2+ ion and 1 F2- ion
1 Pb4+ ion and 4 F- ions
1 Pb+ ion and 1 F- ion
1 Pb2+ ion and 2 F- ions
The formula unit for the ionic compound, manganese(II) oxide, consists of which of the following?
1 Mn2+ ion and 2 O- ions
2 Mn+ ions and 1 O2- ion
1 Mn+ ion and 1 O- ion
1 Mn2+ ion and 1 O2- ion
1 Mn2- ion and 1 O2+ ion
The ionic compound, manganese(II) iodide, is composed of which of the following pairs of ions?
1 Mg2+ ion and 2 I- ions
1 Mn- ion and 1 I- ion
1 Mn2+ ion and 2 I- ions
1 Mn2+ ion and 1 I2- ion
1 Mn+ ion and 1 I- ion
The ionic compound, mercury(I) bromide, is composed of which of the following pairs of ions?
1 Hg2+ ion and 2 Br- ions
1 Hg22+ ion and 2 Br- ions
1 Hg2+ ion and 1 Br- ion
1 Hg+ ion and 1 Br- ion
2 Hg+ ions and 1 Br2- ion
The formula unit for the ionic compound, mercuric chloride, consists of which of the following?
1 Hg2+ ion and 2 Cl- ions
1 Hg+ ion and 1 Cl- ion
1 Hg22+ ion and 2 Cl- ions
2 Hg+ ions and 1 Cl2- ion
1 Hg22+ ion and 1 Cl2- ion
The formula unit for the ionic compound, mercury(II) sulfide, consists of which of the following?
1 Hg+ ion and 1 S- ion
1 Hg22+ ion and 1 S2- ion
1 Hg2+ ion and 2 S- ions
2 Hg+ ions and 1 S2- ion
1 Hg2+ ion and 1 S2- ion
The formula unit for the ionic compound, stannic sulfide, consists of which of the following?
1 Sn2+ ion and 1 S2- ion
1 Sn4+ ion and 4 S- ions
1 Sn2+ ion and 2 S- ions
1 Sn4+ ion and 2 S2- ions
1 Sn4- ion and 2 S2+ ions
The ionic compound, tin(II) fluoride, is composed of which of the following pairs of ions?