Valence Electrons and Lewis Structures

Dr. B explains how to draw the Lewis structure for NH3, also known as ammonia or nitrogen trihydride. The video covers the identification of valence electrons for nitrogen and hydrogen, the placement of atoms, and the formation of chemical bonds to complete the structure. The tutorial concludes with a discussion on the structural formula representation of NH3.

How many valence electrons does Nitrogen have in the periodic table?

• 3

• 5

• 9

• 7

What is the total number of valence electrons in NH3?

• 6

• 7

• 9

• 8

Where do Hydrogen atoms typically go in a Lewis structure?

• On the outside

• Above Nitrogen

• In the center

• Next to Nitrogen

How many valence electrons does each Hydrogen atom need to be stable?

• 3

• 4

• 2

• 1

In the structural formula of NH3, how are the bonding electrons represented?

• By a triangle

• By dots

• By a line

• By a circle