Valence Electrons in PCl4-

Dr. B explains how to draw the Lewis structure for PCl4-. The process involves calculating the total valence electrons, placing phosphorus at the center, and arranging chlorine atoms around it. Each chlorine is bonded to phosphorus, and additional electrons are distributed to complete the octets. Phosphorus can have more than eight electrons due to its position in the periodic table. The structure is verified by checking formal charges, ensuring the best Lewis structure for PCl4- is achieved.

What is the total number of valence electrons in PCl4-?

• 32

• 33

• 35

• 34

What is the significance of the negative charge in PCl4-?

• It indicates a lack of electrons

• It indicates a positive ion

• It indicates an extra valence electron

• It indicates a neutral molecule

Where is the Phosphorus atom placed in the PCl4- Lewis structure?

• At the top

• At the center

• At the bottom

• On the side

How many valence electrons are used to form bonds between Phosphorus and Chlorine atoms?

• 10

• 8

• 6

• 4

How many valence electrons does each Chlorine atom have in the PCl4- structure?

• 9

• 8

• 7

• 6

Why is it acceptable for Phosphorus to have more than eight valence electrons in PCl4-?

• Because it is a transition element

• Because it is a metal

• Because it is a noble gas

• Because it is in period 3 of the periodic table

What is the formal charge on each atom in the PCl4- Lewis structure?

• +1

• 0

• +2

• -1

How many valence electrons are placed on the Phosphorus atom after all Chlorines have octets?

• 12

• 6

• 8

• 10