Naming Binary, Bi-Valent Ionic Compounds- notes
Honors Chemistry
Name_____________________________ Period____
Ionic compounds are compounds composed of ions, charged particles that form when an atom (or group of
atoms, in the case of polyatomic ions) gains or loses electrons.
 A cation is a positively charged ion
Metal
Ion
Systematic name Common name
 An anion is a negatively charged ion.
2+
Chromium
Cr
chromium(II) ion
chromous ion
 Ionic compounds are formed when a
metal reacts with a nonmetal (or a
Cr3+
chromium(III) ion chromic ion
polyatomic ion. These notes will not
Cobalt
Co2+
cobalt(II) ion
cobaltous ion
deal with polyatomic ions.)
3+
Co
cobalt(III) ion
cobaltic ion
 Many Transition group metals can form
Copper
Cu+
copper(I) ion
cuprous ion
more than one cation.
2+
 Many of these ions have common or
Cu
copper(II) ion
cupric ion
trivial names formed from the stem of
Iron
Fe2+
iron(II) ion
ferrous ion
the element name (the Latin name in
3+
Fe
iron(III) ion
ferric ion
some cases) plus the ending -ic or -ous.
Manganese
Mn2+ manganese(II) ion manganous ion
 ic endings go with the higher possible
charge
Mn3+ manganese(III) ion manganic ion
 ous endings go with the lower possible
Mercury
Hg22+ mercury(I) ion
mercurous ion
charge
Hg2+
mercury(II) ion
mercuric ion
 The systematic names (also known as
2+
Nickel
Ni
nickel(II) ion
nickelous ion
the Stock system) for these ions are
Ni3+
Nickel(III) ion
nickelic ion
derived by naming the metal first,
2+
followed in parentheses by the charge
Tin
Sn
tin(II) ion
stannous ion
written in Roman numerals.
Sn4+
tin(IV) ion
stannic ion
 For the metals that typically form only
2+
Pb
lead(II) ion
plumbous ion
one charge, it is not necessary to specify Lead
Pb4+
lead(IV) ion
plumbic ion
the charge in the compound name.
 For example, iron can form two possible
ions, 2+ and 3+. The Fe2+ ion is known as the ferrous ion (common) or the iron(II) ion (systematic);
the Fe3+ ion is known as the ferric ion (common) or the iron(III) ion (systematic).
 The mercury(I) cation is a special case; it consists of two Hg+ ions joined together, and so is always found as
Hg22+. (Hence, mercury(I) chloride is Hg2Cl2, not HgCl, while mercury (II) chloride is HgCl2.)

ions
Stock name
Common name
FeCl2
________________________
Cu2O
_________________________
___________________________
_________________________
___________________________
1. SnS2
p
___________________________
Honors Chemistry Nomenclature Worksheet #1
Name_____________________________ Period_____
Write the formulas for the following ionic compounds:
1) titanium (IV) oxide __________________________
2) calcium bromide
___________________________
3) ferrous chloride
___________________________
4) chromic oxide
___________________________
5) manganese (VII) arsenide _____________________
6) vanadium (V) nitride __________________________
7) platinum (II) sulfide ___________________________
8) iron (II) arsenide
___________________________
9) beryllium chloride ___________________________
10) silver oxide
___________________________
11) potassium sulfide ___________________________
Name the following ionic compounds. When appropriate provide the stock and common name:
12) KI __________________________________________________________________________________
13) SnBr4 _________________________________________________________________________________
14) Mg3P2 ________________________________________________________________________________
15) NaF __________________________________________________________________________________
16) Al2Se3 ________________________________________________________________________________
17) NaBr _________________________________________________________________________________
18) Zn3P2 ________________________________________________________________________________
19) Cu2O _________________________________________________________________________________
20) SnS2 __________________________________________________________________________________
21) FeCl2___________________________________________________________________________________________________________________________
22) Cr2O3__________________________________________________________________________________________________________________________