Name _________________________________________
Date _________________
Class _________________
Chemical Bonds
I. Testing Concepts
Directions: In the blank at the left, write the letter of the term that best completes each statement.
_________
1. Copper, sulfur, and oxygen are examples of ______.
a. elements
b. compounds
c. mixtures
d. colloids
_________
2. A chemical ______ tells what elements a compound contains and the exact number of the
atoms of each element in a unit of that compound.
a. formula
b. table
c. dot diagram
d. chart
_________
3. H2O is also known as ______.
a. carbon
b. mercury
c. nickel
d. water
_________
4. A chemical ______ is the force that holds atoms together in a compound.
a. bond
b. element
c. compound
d. formula
_________
5. A charged particle is known as a(n) ______.
a. plasma
b. gas
c. ion
_________
d. neutron
6. The attraction that forms between atoms when they share electrons is known as
a(n) ______ bond.
a. ionic
b. covalent
c. simple
d. net
Directions: Identify each statement as true or false. If the statement is false, change the underlined word(s) to
make it true.
_________
7. Elements can unite chemically to form compounds.
_________
8. A covalent bond is the force of attraction between the opposite charges of the ions in
an ionic compound.
_________
9. A neutral particle that forms as the result of electron sharing is called an ion.
_________ 10. A nonpolar molecule has a slightly positive end and a slightly negative end.
_________ 11. A polar molecule is one in which electrons are shared equally in bonds.
_________ 12. A binary compound is one that is composed of two elements.
Chapter Resources • Chemical Bonds
33
Name _________________________________________
Date _________________
Class _________________
Chemical Bonds CONTINUED
II. Understanding Concepts
Skill: Using Tables
Directions: Use the following table to answer questions 1 through 3.
Element/polyatomic ion
Symbol
Oxidation number
Potassium
K
1
Magnesium
Mg
2
Oxygen
O
2
Nitrate
NO3
1
Sulfate
SO4
2
Phosphate
PO4
3
_________
_________
_________
1. What is the correct formula for magnesium nitrate?
a. MgNO3
b. Mg2NO3
c. Mg(NO3)2
d. Mg2(NO3)2
2. What is the charge of phosphate in K3PO4?
a. 3
b. 1
c. 5
d. 7
3. How many potassium atoms and how many oxygen atoms are there in a binary
compound made from these two elements?
a. one potassium and two oxygen
b. two potassium and one oxygen
c. one potassium and one oxygen
d. three potassium and one oxygen
Directions: Match each item on the left with the correct term.
Matching Set 1
_________ 4. a charged particle
a. ion
_________
5. a neutral particle formed as a
result of electron sharing
b. nucleus
_________
6. the center of an atom
c. molecule
Matching Set 2
_________ 7. made up of two shared electrons
d. multiple covalent bond
_________
8. contains more than one pair of electrons
e. single covalent bond
_________
9. formed by the attraction between opposite
charges in an ionic compound
f. ionic bond
Chapter Resources • Chemical Bonds
34
Name _________________________________________
Date _________________
Class _________________
Chemical Bonds CONTINUED
III. Applying Concepts
Writing Skills
Directions: Answer the following questions using complete sentences.
1. Contrast a single covalent bond with a triple covalent bond.
2. List What factors influence the strength of the attraction of each atom to its electrons?
3. Distinguish “I know the charges of the individual ions in this compound,” a friend says, “I’m
just trying to figure out what the net charge of the compound is.” How would you respond?
Chapter Resources • Chemical Bonds
35