Home » For a given principal level n = 4, the energy of its subshells is in the order Atomic Structure MCQs For a given principal level n = 4, the energy of its subshells is in the order January 8, 2022 52 Views Q. For a given principal level n = 4, the energy of its subshells is in the orderA. s B. s > p > d > fC. s D. f Answer: s