Name: __________________
Date: ______________
Section 8.2 The Nature of covalent Bonding
Matching
a.
b.
c.
d.
e.
f.
single covalent bond
structural formula
unshared pair
double covalent bond
triple covalent bond
polyatomic ion
1. ___b___ represents the covalent bonds by dashes and shows the arrangement of
covalently bonded atoms
2. ___d___ a bond that involves two shared pairs of electrons
3. ____f__ tightly bonded group of atoms that has a positive or negative charge
4. ____a__ a bond formed when two atoms share a pair of electrons
5. ____c__ a pair of valence electrons that are not shared between atoms
6. ____e__ a bond formed by sharing three pairs of electrons
Practice
1. Circle the unshared pairs of electrons in a water molecule.
..
:
O :H
..
H
2. Complete the electron dot structure for each molecule.
a) NH3
H
|
N-H
|
H
b) H2O2
H
\
O=O
\
H
c) CH4
H
|
H-C-H
|
H
3. How many electrons are shared in a double covalent bond?
4
4. Which of the following is the name given to the pairs of valence electrons that do
not participate in bonding in diatomic oxygen molecules?
a. inner pair
b. outer pair
c. unshared pair
d. valence electrons
5. All diatomic molecules contain double bonds
a) true
b) false
6. In a structural formula a shared pair of electrons is represented by two dashes.
a) true
b) false
7. Structural formulas show the arrangement of __________ in molecules.
a. atoms
b. molecules
c. valence electrons
d. electrons
8. How is an electron dot structure used to represent a covalent bond?
a. represent unshared pair
b. represent shared pair
c. represent valence electrons
d. represent bond
9. What does a structural formula represent?
The covalent bonds by dashes and shows the arrangement of covalently
bonded atoms.
10. What happens to the electron configuration of an atom when it forms a covalent
bond?
Electrons are shared in order for it to become a noble gas.