Valence Electrons in PH3 Molecule

Dr. B explains how to draw the Lewis structure for PH3. Starting with the valence electrons, Phosphorus is placed in the center with three Hydrogens around it. Electrons are distributed to form bonds, ensuring each Hydrogen has a full outer shell with 2 electrons, and Phosphorus has 8 electrons for a full shell. The video concludes with a complete PH3 Lewis structure.

How many valence electrons does Phosphorus have in the PH3 molecule?

• 7

• 5

• 8

• 3

In the PH3 Lewis structure, where is the Phosphorus atom placed?

• Above the Hydrogens

• Next to one Hydrogen

• In the center

• On the outside

How many valence electrons are used to form bonds between Phosphorus and Hydrogen in PH3?

• 6

• 8

• 4

• 2

What is the total number of valence electrons in the PH3 molecule?

• 12

• 10

• 8

• 6

Why do the Hydrogen atoms in PH3 only need 2 valence electrons?

• Because they are in group 2

• Because they form double bonds

• Because they achieve a full outer shell with 2 electrons

• Because they share electrons with each other