How Many Electrons Are in Each Energy Level?


Quick Answer

The number of electrons present in a given energy level depends on the element. The formula for determining the electron capacity for each energy level is "two times n squared," where n is equal to the number of the level.

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Full Answer

According to Jefferson Lab, the highest possible electrons in each energy level is: two for level one, eight for level two, eighteen for level three, thirty-two for level four, fifty for level five, seventy-two for level six and ninety-eight for level seven.

Levels do not necessarily have to contain their maximum number of electrons before electrons start going into the next level. The outermost shell for a particular atom is called the valence shell.

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