Question

Why does atomic radius increase from top to bottom in a chemical family
a. Nuclear charge increases from top to bottom in a chemical family.
b. Nuclear charge decreases from top to bottom in a chemical family.
c. The number of energy levels increases from top to bottom in a chemical family.
d. The number of energy levels decreases from top to bottom in a chemical family.
e. The number of electrons decreases from top to bottom in a chemical family.

Answer 1

Answer:

Nuclear charge decrease from top to bottom

Answer 2

Answer:

The correct option is (c)

Option (c): The number of energy levels increases from top to bottom in a chemical family.

Atomic radius increases from top to bottom in a chemical family because as we move from top to bottom number of energy levels increases.

The trend for the atomic radius in a vertical column is to go from smaller at the top to larger at the bottom of the family.

With each step at the bottom of the family, we insert a completely new PEL (photoelectron layer) into the electron cloud, making the atoms larger with each step.