Carbon

6 bonds

5 bonds

4 bonds

3 bonds

2 bonds

1 bonds

none

C(+)

5 electrons

Effective Valence: 3

Inorganic

a)

b)

C

6 electrons

Valence: 4

Inorganic

c)

d)

e)

C(-)

7 electrons

Effective Valence: 3

Organic

f)

g)