Valence Electrons and Molecular Structure

Dr. B explains how to draw the Lewis structure for CS2. Starting with the calculation of valence electrons, he places carbon in the center and sulfur atoms on either side. He distributes the electrons to ensure each atom achieves an octet, adjusting as necessary to share electrons between atoms. The final structure is verified, and Dr. B introduces the concept of a structural formula, where lines represent pairs of electrons.

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

• 6

• 8

• 4

• 2

What is the total number of valence electrons available for CS2?

• 14

• 12

• 18

• 16

Which atom is placed at the center of the CS2 molecule?

• Sulfur

• Oxygen

• Hydrogen

• Carbon

How many electrons are initially placed between each Carbon and Sulfur atom?

• 1

• 2

• 3

• 4

What is the issue with the initial electron distribution in the CS2 molecule?

• Carbon does not have a full octet

• There are too few electrons

• Sulfur has too many electrons

• Sulfur does not have a full octet

How is the octet rule satisfied for Carbon in CS2?

• By adding more electrons

• By rearranging the atoms

• By removing electrons from Sulfur

• By sharing electrons between Carbon and Sulfur

What does a line represent in the structural formula of CS2?

• A bond between three atoms

• A pair of electrons

• A single electron

• An unpaired electron

What is the final electron configuration for Sulfur in the CS2 molecule?

• 6 electrons

• 7 electrons

• 8 electrons

• 9 electrons