Question

Which subshell does not exist?

Answer 1

Answer:

The answer is (b) 2d . The third energy level, the electrons are located only in the s and p subshell so 2d subshell do not exist.

Explanation:

In the ground state for each energy level: ... In the 1st energy level, electrons occupy only in the s sublevel, so there is no d sublevel. In the 3rd energy level, electrons occupy only the s, p, and d sublevels, so there is no f sublevel.