Question

multiple - choice question
ionization energy ______ down a group because the atom is getting bigger
increases
stays the same
decreases
rewatch

Explanation:

As you move down a group in the periodic table, the atomic radius increases due to the addition of electron - shells. The outermost electrons are farther from the nucleus and are less tightly held. So, less energy is required to remove an electron, resulting in a decrease in ionization energy.

Answer:

C. decreases