Lewis Structures and Valence Electrons

Dr. B explains how to draw the Lewis structure for ethane (C2H6). The video covers calculating valence electrons, drawing the structure, ensuring octets are satisfied, and representing the molecule as a structural formula. The process involves understanding the valence electrons of carbon and hydrogen, forming bonds, and verifying the octet rule.

How many valence electrons does each carbon atom contribute in the Lewis structure of ethane?

• 2

• 4

• 8

• 6

What is the total number of valence electrons available for constructing the Lewis structure of C2H6?

• 14

• 10

• 16

• 12

Where are hydrogen atoms typically placed in a Lewis structure?

• Between carbon atoms

• Next to each other

• On the outside

• In the center

How many valence electrons are used to form the central bond between the carbon atoms in ethane?

• 4

• 3

• 1

• 2

What is the total number of valence electrons used in the Lewis structure of ethane?

• 16

• 14

• 12

• 10

In a structural formula, what do the lines between atoms represent?

• Protons

• Neutrons

• Pairs of electrons

• Single electrons