Chemistry Worksheet
Name: ______________________________
Nomenclature Review
Block: ______ Date: __________________
1. Review of charges and names of ions. Use your periodic table to fill in the following table of
monatomic ions. [Prerequisite reading/Reference – Section 3.5 (review) and Section 4.1]
Name of Ion
Metallic Ion or Nonmetallic ion?
Formula
magnesium ion
potassium ion
aluminum ion
chloride
oxide
phosphide
Br−
Sr2+
S2−
Ba2+
N3−
Li+
2. Fill in the blanks
a. _______________________ ions, also known as ______________________, are derived
from metals, and __________________ ions, also known as ____________________,
are derived from nonmetals.
b. The names of all nonmetallic monatomic ions end with _________________.
Copyright© 2016, Science Teachers at Newton South High School, Newton, MA 02459
3. Naming and Formula Writing for Type I Binary Compounds.
[Prerequisite reading – Sec. 4.1]
Compounds consisting of two elements are called binary compounds. For example,
aluminum oxide (Al2O3) consists of two elements, aluminum and oxygen, and is thus a
binary compound. Binary compounds consisting of a metal that can only form one type of
cation and a nonmetal are called Type I binary compounds; binary compounds containing
metal ions that can form two or more types of cations with different charges are called Type
II binary compounds. Since Type I and Type II compounds all consist of a metals plus
nonmetals, Type I and Type II compounds are all ionic compounds.
Elements in Group I on the periodic table can only form 1+ ions, and elements in Group II
can only form 2+ ions. Additionally, zinc can only form a 2+ ion, silver can only form a 1+
ion, and cadmium can only form a 2+ ion. Group I ions, Group II ions, and zinc, silver, and
cadmium ions are the ions found in Type I binary compounds, since each can only from one
type of ion.
a. Name the following Type I binary compounds (see the text for rules!)
Formula
Name
Formula
CsCl
Na2O
K2S
Mg3P2
NaF
Li3N
BaCl2
CaCl2
LiF
Rb2O
Name
b. Write the formulas for the following Type I binary compounds.
Name
Formula
Name
sodium chloride
calcium oxide
magnesium fluoride
barium nitride
sodium sulfide
potassium iodide
aluminum fluoride
magnesium sulfide
aluminum sulfide
calcium bromide
Formula
Chemistry Worksheet
Binary Compounds
4. Naming and Formula Writing for Type II Binary Compounds.
[Prerequisite reading – Sec. 4.1]
Type II binary compounds consist of metal ions that can form more than one type of cation,
along with nonmetals. For example, iron atoms can form ions that have two different
charges – Fe2+ and Fe3+. Thus FeCl2, also known as iron(II) chloride, and FeCl3, also known
as iron(III) chloride, are Type II binary compounds. The Roman numerals in the names
simply stand for the charges of the ions. Iron(II) is the Fe2+ ion, and iron(III) is the Fe3+ ion.
The Roman numerals, and thus the charges, must be included in the names for Type II binary
compounds to communicate which of the possible ions is present in the compound. Calling
either of the above compounds “iron chloride” would be incorrect because there would be no
way of knowing if the iron present is in the 2+ or 3+ form.
a. Write the formulas for the following Type II binary compounds.
Name
Formula
Name
lead(II) sulfide
tin(IV) oxide
lead(IV) oxide
tin(II) oxide
copper(II) chloride
iron(II) oxide
copper(I) chloride
iron(III) oxide
nickel(II) bromide
gold(III) bromide
Formula
b. Name the following Type I binary compounds (see the text for rules!)
Formula
Name
Formula
HgS
PbS2
Cu2O
Sn3N4
CuO
FeN
BaCl2
Fe3N2
Ni2O
NiO
Copyright© 2015, Alan D. Crosby, Newton South High School, Newton, MA 02459
Name
5. Naming and Formula Writing for Type III Binary Compounds.
[Prerequisite reading – Sec. 4.1]
Type III binary compounds contain only two elements, but both elements are nonmetals.
Whereas Type I and Type II binary compounds are ionic compounds consisting of formula
units, Type III are covalent compounds consisting of molecules. Because a given pair of
nonmetals frequently can combine in multiple ways to form different molecules, these
molecules, and thus the compounds they compose, are named using Greek prefixes. For
example, nitrogen and oxygen can combine in four different ways: NO, N2O, NO2, and N2O4.
The names for these molecules and their compounds are nitrogen monoxide, dinitrogen
monoxide, nitrogen dioxide, and dinitrogen tetroxide respectively.
a. Name the following Type I binary compounds (see the text for rules!)
Formula
Name
Formula
CO
PCl3
CO2
SF6
N2O4
NF3
P4O10
SO2
Cl2O
SO3
Name
a. Write the formulas for the following Type III binary compounds.
Name
Formula
Name
nitrogen dioxide
tetraphosphorus
hexasulfide
disulfur dibromide
iodine pentafluoride
silicon dioxide
phosphorous pentachloride
carbon disulfide
dichlorine heptoxide
Formula
Chemistry Worksheet
Binary Compounds
6. Review Questions (Please note-if you find yourself hunting for answers on all of these
questions, you probably did not read the textbook carefully enough, or were not mindful
enough in completing the above exercises!)
a. What is a binary compound?
b. How can you tell if a compound is ionic or covalent by looking at its formula?
c. Why are no Roman numerals, and no Greek prefixes, needed in naming Type I binary
compounds?
d. Label as an ionic compound or a covalent compound:
a. Type I binary compound
______________________________
b. Type II binary compound
______________________________
c. Type III binary compound
______________________________
e. What do the Roman numerals in the names of Type II ionic compounds mean?
f. Why are Roman numerals essential for naming Type II binary compounds?
g. Which groups of elements on the periodic table form metal ions that do not require
Roman numerals in their names?
h. What are three additional common ions that do not need Roman numerals in their names?
i. Generally speaking, where on the periodic table are the elements that form ions requiring
Roman numeral in their names?
j. Why are Greek prefixes used for naming covalent compounds, but not for naming ionic
compounds?
Copyright© 2015, Alan D. Crosby, Newton South High School, Newton, MA 02459
k. Summarize how you can recognize Type I, Type II, and Type III ionic compounds.
Phrases, rather than sentences, are fine.
a. Type I
b. Type II
c. Type III
l. Summarize how names are written from the formulas of each. Phrases, rather than
sentences, are fine.
a. Type I
b. Type II
c. Type III