Nonmetals like C,N,S and P are typically the central atom in a molecular compound rather than nonmetals such as O,F,H and Cl. One reason for this is:
a) C,N,S, and P cannot hybridize atomic orbitals to allow as many bonds as allowed.
b) O,F,H, and Cl are less likely to share electrons with more than 2 atoms
c) More metallic nonmetals have more desire for electrons
d) less metallic nonmetals have more desire for electrons