Question

How many energy sublevels are in the second principal energy level?

Answer 1

There are two energy sublevels s and p.

Step-by-step explanation:

The principal energy level is a shell in which the electron is located. There are four principal energy level K, L, M, N. These are further divided in energy sublevel s, p, d, f. In first principal energy level (K) there is only one energy sublevel s. In second principal energy level (L) there are two energy sublevel s and p similarly in third (M) and fourth (N) principal energy level there are three (s, p, and d) and four (s, p, d, and f) energy sublevel respectively.

Answer 2

There are two energy sublevels in the second principal energy level. These two energy sublevels are 2s and 2p. The energy distribution in an atom is divided into a number of principal energy levels, and the principal energy levels are again divided into four basic energy sublevels.