Question: how many subshells in n=1?
Answer: Thus, the first shell (n = 1) consists of only one subshell, the ls (l = 0); the second shell (n = 2) consists of two subshells, the 2s (l = 0) and 2p (l = 1); the third shell consists of three subshells, 3s, 3p, and 3d, and so forth. Each subshell consists of a specific number of orbitals.