# Question 39895

Feb 26, 2015

Scandium, or $\text{Sc}$, is located in group 3, period 4 of the periodic table and has an atomic number equal to 21.

This means that the electron configuration for a neutral $\text{Sc}$ atom must account for 21 electrons.

$\text{Sc} : 1 {s}^{2} 2 {s}^{2} 2 {p}^{6} 3 {s}^{2} 3 {p}^{6} 4 {s}^{2} 3 {d}^{1}$

SInce argon is the last noble gas that comes scandium in the periodic table, the noble gas shorthand notation, the electron configuration for $\text{Sc}$ will be

"Sc": ["Ar"] 4s^(2) 3d^(1)#