Question

multiple - choice question
why do smaller atoms have a higher ionization energy?
the valence electrons are closer to the pull of the protons in the nucleus
the valence electrons are farther from the pull of the protons in the nucleus
rewatch

Explanation:

Ionization energy is the energy required to remove an electron from an atom. In smaller atoms, the valence electrons are closer to the positively - charged nucleus. The stronger electrostatic attraction between the nucleus and the valence electrons makes it harder to remove an electron, thus resulting in higher ionization energy.

Answer:

the valence electrons are closer to the pull of the protons in the nucleus