Valence Electrons Periodic Table

Valence Electron Basics
Learn how to use the periodic table in order to determine the number of valence electrons.
The valence electrons are the electrons found in the outer shell of an atom. The outer shell is also called the orbitals or the atomic electron shells.
I also show two methods of illustrating the valence electrons.
The Bohr diagram and the Lewis dot structure.
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What happens when you mix sodium and water?
Hint: It involves fire.
https://www.youtube.com/watch?v=YRPuDQtB_5Y&t=41s