# How do you read the Electron Configuration Periodic Table? For example, if yu wanted to find Mg what would its configuration be?

Jun 20, 2018

You can start by writing the subshell notation of the element you want to find

#### Explanation:

Subshell notation of magnesium is 2.8.2.

We know that magnesium is in Group 2, Period 3. Hence it has an energy level of 3.

By doing this, we can start listing out the electron configuration of magnesium.

$1 {s}^{2}$$2 {s}^{2}$$2 {p}^{6}$$3 {s}^{2}$

For any other elements, simply write down the total number of electrons. You will realize that once you finish writing the electron configuration, the numbers will add up the the number of electrons of the element you want to find.