Question

For an atom’s electrons, how many energy sublevels are present in the principal energy level n=4?

Answer 1

s,p,d i believe

Step-by-step explanation:

Level one has one sublevel – s. Level 2 has 2 sublevels - s and p. Level 3 has 3 sublevels - s, p, and d. Level 4 has 4 sublevels - s, p, d, and f.