In which of the following pairs of bonds is the shorter bond length not followed by the longer bond length? c―si, c―s n≡o, n=o s―o, p―o c≡c, c=c c=o, c=s

There is one s orbital, and there are three p orbitals, five d orbitals, and seven f orbitals. thus, the answer is b. do not confuse the number of orbitals in a subshell with the number of electrons the subshell can hold. each orbital can hold two electrons, so the capacity of an nf subshell is 14 electrons.

And a) oxygen i believe

Your question is not clear but if you can explain yourself i would be glad to .  just trying to : ))