Sal starts this video by looking at a traditional chain of carbons and working through the different ways they can be diagrammed.

Electronegativity is defined and compared to electron affinity. Trends based on groups and periods are also explored. [9:54]

This lesson will explain how to identify the number of valence electrons an element has based on its position on the periodic table. It is 1 of 3 in the series titled "Identifying Valence Electrons."

A video lecture which explains the Bohr model of an atom, and explains how to create and use Bohr model diagrams to solve some practice problems. [11:51]

Learn how to identify a chemical element and the number of valence electrons when given its electron configuration. [9:14]

A narrated tutorial illustrates the structure of Lewis Dot diagrams, and shows how to create a Lewis Dot diagram for an element. [7:52]

Using orbital diagrams, this video tutorial illustrates the difference between paired and unpaired electrons in an atom. [3:42]

This video explores how to make an atom happy by fillings its outer shell! Learn about valence electrons. Also understand that by adding or subtracting electrons, atoms form ions which are no longer neutral but contain a charge. Video...

This lesson will define valence electrons and describe their behavior. It is 3 of 7 in the series titled "Valence Electrons."

This lesson will define valence electrons and describe their behavior. It is 7 of 7 in the series titled "Valence Electrons."

This lesson will demonstrate how to identify the central atom in a given molecule using a Lewis dot diagram. It is 2 of 2 in the series titled "VSEPR: Central Atoms."

This lesson will demonstrate how to identify the central atom in a given molecule using a Lewis dot diagram. It is 1 of 2 in the series titled "VSEPR: Central Atoms."