Sublevels continued

Here's how they work.

Sublevels are as follows, they hold electrons so-

s can hold 2

p can hold up to 6

d can hold up to 10

f can hold up to 14.

The order of which they occur/ are arranged are as follows,

1s,2s,2p,3s,3p,4s,3d,4p,5s,4d,5p,6s,4f etc..

4s fills before 3d due to the fact 4s has less energy than 3d.