sublevel# of electrons in each sublevel
s2
p6
d10
f14
g18

The Principal Energy Level (the #) only holds that # of sublevels.


Principal Energy Level# of Sublevels sublevels
111s
222s 2p
333s 3p 3d
444s 4p 4d 4f
555s 5p 5d 5f 5g

Yes, the 5th energy level holds 5 sublevels and that last one would be 5g.

Electrons add in energy order (Aufbau Principle) not energy level order.
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d10 7p6

Maximum number of electron in an energy level (2n2)

Principal Energy Level(n)sublevelselectronstotal electrons
11s22
22s 2p2 + 68
33s 3p 3d2 + 6 +1018
44s 4p 4d 4f2 + 6 + 10 + 1432
55s 5p 5d 5f 5g2 + 6 + 10 + 14 + 1850

Maximum number of orbitals in an energy level (n2)

Principal Energy Level(n)sublevelselectronstotal electronstotal orbitals
11s221
22s 2p2 + 684
33s 3p 3d2 + 6 +10189
44s 4p 4d 4f2 + 6 + 10 + 143216
55s 5p 5d 5f 5g2 + 6 + 10 + 14 + 185025

Sublevels are broken down into orbitals

an orbital holds 2 electrons

*

Here is an animation of how the orbitals would look as you build out from the 1s.Pauli Exclusion PrincipleWhen we draw electrons, we use up and down arrows. So, if an electron is paired up in a box, one arrow is up and the second must be down.Hund’s Rule

When filling sublevels other than s, electrons are placed in individual orbitals before they are paired up.