Question

What factor(s) may be responsible for the ionization energy within a period?

A.) The valence electrons are further from the nucleus when moving from left to right.
B.) The valence electrons remain at the same distance from the nucleus when moving left to right.
C.) The diameter of the atom decreases somewhat as electrons are added.
D.) The attractive force of the nucleus increases.

Answer 1

The factors that may be responsible for the ionization energy within a period is

• The diameter of the atom decreases somewhat as electrons are added.
• The attractive force of the nucleus increases

Step-by-step explanation

• ionization energy is the Electron shielding.

• Generally there is increase of ionization across the period that is from the left to the right.

• Across the period ( from left to right) the diameter of the atom decreases. This make it harder to remove an electron as you go across the period, thus ionization energy increase across the period ( from left to right).
• The force of attraction of the nucleus increase across the period ( from left to right). This is due to increase in number of protons across the period.

Answer 2

"The diameter of the atom decreases somewhat as electrons are added" and "The attractive force of the nucleus increases" are the factors that may be responsible for the ionization energy within a period. The correct options among all the options that are given in the question are option "C" and option "D".