# What is 1s^(2)2s^(2)2p^(6)3s^1 the electron configuration for?

Jun 12, 2018

Sodium (Na)

#### Explanation:

The outer electrons are on the 3rd energy level sub-shell (due to the $3 {s}^{1}$ Thus we can deduce that the element is in the third period of the periodic table.

There are 1 electrons in total in the final sub-shell (adding all the powers of the 3'rd level)

This means it's in group 1.

From this we can deduce it being Na (Sodium)