Problem: Indicate the hybridization about each interior atom in CH3NH2 (skeletal structure H3CNH2).

We are asked to indicate the hybridization of each interior atom in CH₃NH₂ (skeletal structure H₃CNH₂).

The internal atoms are C and N. 

Orbitals that can be used by the central atom:

Subshell                   Total # of orbitals 

        s             _                 1 orbital  

        p          _ _ _              3 orbitals

        d        _ _ _ _ _          5 orbitals

Lewis structure of CH₃NH₂ :

C→ Group 4A → 1 x 4 ve = 4 ve

H → Group 1A → 5 x 1 ve = 5 ve

N→ Group 5A → 1 x 5 ve = 5 ve

Total = 14 ve