Question

what are the subshell present in shell

Answer 1

Orbitals that have the same value of the principal quantum number form a shell. Orbitals within a shell are divided into subshells that have the same value of the angular quantum number . Chemists describe the shell and subshell in which an orbital belongs with a two-character code such as 2p or 4f.

Answer 2

Usually the main shells are K,L,M,N
And the subshell that are parent in this main shells are s,p,d,f these are
1S,2S,2P,3S,3P,3d,4S,4P,4d,4f and so on........