CH1012
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16
HYBRIDISATION III
Ethene C2H4
Ethane C2H6
C = sp3
C = sp2
s  bond = sp3 + s
s  bond = sp3 + sp3 
s  bond = sp2 + sp2
s  = circular section normal to bond axis (x)
p  = dumbbell section normal to bond axis (x)
p  bond = pz + pz