Valence Electrons and Formal Charge in SF4

Dr. B explains how to draw the Lewis structure for sulfur tetrafluoride (SF4). The video covers the calculation of valence electrons, positioning of atoms, formation of bonds, and completion of octets. It also includes checking formal charges to ensure the best structure. The tutorial concludes with a confirmation that the structure is correct.

How many total valence electrons are present in the SF4 molecule?

• 28

• 32

• 34

• 36

Which atom is placed at the center of the SF4 molecule?

• Fluorine

• Sulfur

• Oxygen

• Nitrogen

How many valence electrons are used in forming bonds initially in SF4?

• 4

• 6

• 10

• 8

What is the total number of valence electrons used to fill the octets in SF4?

• 32

• 28

• 34

• 24

Why can sulfur have more than eight valence electrons in SF4?

• It is in period 2

• It is in period 3

• It is a noble gas

• It is highly electronegative

What is the formal charge on sulfur in the SF4 molecule?

• -1

• +2

• 0

• +1

What is the formal charge on each fluorine atom in SF4?

• +2

• 0

• -1

• +1