Covalent Molecules And Lewis Structures Worksheet With Answers Page 10
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10Part III: Analyze and Conclude
1. How many covalent bonds form around each of the following atoms:
a. hydrogen ! 1!
!
!
d. nitrogen
!
3
b. carbon
! 4!
!
!
e. chlorine
!
1
c. oxygen
! 2!
!
!
f. bromine
!
1
2. In a molecular model, a single gray link (single bond) between two elements
represents
2
electrons.
3. Identify the type of bond described for each of the following as ionic, polar covalent, or
nonpolar covalent.
polar covalent
a. The C–O bonds in CO
nonpolar covalent
b. The bonds in F
2
2
!
ionic
c. The bonds in K
O!
!
nonpolar covalent
d. The C–C bonds in C
H
2
3
8
4. How many unshared pairs of electrons are found on the nitrogen atom in NH
?
1
3
5. How many electrons are shared in the triple bond in N
?
6
2
6. Water and carbon dioxide molecules are both made up of 3 atoms. Referring to Data
Table 4, state several differences between water molecules and carbon dioxide
molecules.
Water is composed of 1 oxygen atom and 2 hydrogen atoms. Water has only single
bonds. Water has two pairs of unshared electrons. Water is a bent molecule.
Carbon dioxide is composed of one carbon atom and 2 oxygen atoms. Carbon dioxide
has 2 double bonds. The carbon atom does not have any unshared electrons. Carbon
dioxide is a linear molecule.
7. How many double bonds does carbon dioxide contain?
2
8. Does the carbon atom in carbon dioxide have an octet of electrons?
yes
9. Which of the following elements (C, H, O, or N) will NOT be surrounded by an octet of
electrons in a correctly drawn Lewis structure?
H, hydrogen
10. Which of the diatomic elements (N
, O
, F
, or Br
) has a double bond between its
2
2
2
2
atoms?
O
, oxygen
2
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