Concept
Version 21
Created by Boundless
Writing Lewis Symbols for Atoms
Valence Electrons and the Periodic Table
Electrons can inhabit a number of energy shells. Different shells are different distances from the nucleus. The electrons in the outermost electron shell are called valence electrons, and are responsible for many of the chemical properties of an atom. This video will look at how to find the number of valence electrons in an atom depending on its column in the periodic table.