HYDROCARBONS
TETRAHEDRAL
LIQUIDS
CARBON
GASES
I
U
P
I
F
W
Y
U
E
G
B
Q
K
F
O
T
H
T
U
I
V
D
G
O
O
U
D
R
R
I
A
Y
U
I
F
I
Y
N
Q
O
P
U
M
X
A
A
D
A
X
F
S
U
T
S
U
K
U
T
E
M
I
R
Q
N
H
N
L
U
W
S
Q
Q
T
U
Y
C
O
M
S
U
G
O
E
D
O
J
A
P
B
B
E
C
L
D
E
I
E
I
V
H
I
A
R
U
I
E
A
C
H
U
T
U
X
X
D
A
A
V
S
E
A
R
O
B
X
Q
S
X
C
U
N
E
U
E
O
O
B
P
I
I
C
U
O
F
U
E
A
A
A
I
C
O
Q
L
A
S
A
N
E
C
D
D
Z
I
U
Q
N
A
L
L
E
E
V
J
S
E
S
A
G
U
U
S
S
I
T
E
T
R
A
H
E
D
R
A
L
Y
