Naming Molecules of Covalent Bonds
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Transcript Naming Molecules of Covalent Bonds
MULTIPLE BONDS AND
NAMING MOLECULES
OF COVALENT BONDS
Chemistry
Unit 3, Day 6
MULTIPLE COVALENT BONDS
Sharing multiple pairs of electrons results in multiple covalent
bonds
Double Bond (a.k.a. pi bond π)
2 pairs of electrons involved in bonding
O2
O + O
O=O
Triple Bond
3 pairs of electrons involved in bonding
N2
N + N
N
N
NAMING BINARY MOLECULAR
COMPOUNDS
There are three rules
1. The first element is given its full name
2. The second element uses the root of its
name, but the suffix –ide
3. Both elements use prefixes to express
the number of atoms present, but the
first element never uses the prefix
mono-
PREFIXES IN COVALENT
COMPOUNDS
Number of Atoms
Prefix
1
2
3
4
MonoDiTriTetra-
5
6
7
PentaHexaHepta-
8
9
10
OctaNonaDeca-
EXAMPLE PROBLEMS
N2O – covalent bond
1. First element = nitrogen
2. Second element = oxygen
Change oxygen to oxide
3. Add prefixes for the number of atoms
Dinitrogen monoxide
CO – covalent bond
1. First element = carbon
2. Second element = oxygen
Change oxygen to oxide
3. Add prefixes for the number of atoms
Carbon monoxide
NAME THE FOLLOWING
COMPOUNDS:
1.
CO2
Carbon dioxide
2. SO2
Sulfur dioxide
3. NF3
Nitrogen trifluoride
4. CCl4
Carbon tetrachloride
5. P2O5
Diphosphorous pentaoxide
PROVIDE THE FOLLOWING
FORMULAS:
1.
Dihydrogen monoxide
H 2O
2. Chlorine trifluoride
ClF3
3. Diphosphorous trioxide
P2O3
4. Disulfur decafluoride
S2F10
GUIDED PRACTICE –
THINK, PAIR, SHARE
Work with a partner. Give the name And the Lewis
Structure:
1.
2.
3.
4.
SiF4
HBr
B2H4
NBr3
Work with your partner. Give the compound and the
Lewis Structure:
1.
2.
3.
4.
Sulfur Dichloride
Iodine Monofluoride
Dicarbon Dihydride
Silicon Dioxide
INDEPENDENT PRACTICE – EXIT
TICKET
1.
Provide the name:
C2H6
2.
Provide the Lewis Structure:
C2H6
3.
Provide the formula:
Tricarbon octahydride
4.
Provide the Lewis Structure:
Tricarbon octahydride