# Question #7621c

Sep 1, 2017

Look at the orbitals s,p,d,f.

#### Explanation:

Basically, the s, p, d, and f orbitals are part of the electron shells, and by looking at the periodic table, one can deduce the spdf configuration (e.g. $\text{Mg}$ has a $1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2}$ spdf configuration)

Based on this, the more orbitals it has, the higher the energy level.

Hope this helps!

So, in this case, Mg would have 3 energy levels.