As the atomic size of an element increases, the ionization energy increases. This is true for the elements across the period (horizontally, left to right).
However for families or groups (from top to bottom), the ionization energy of an element decreases as its atomic size (also known as atomic radius) increases.
Take note that ionization energy is the amount of energy required for an atom to lose an electron. Atomic radius is the size of an atom from its nucleus.
Answers & Comments
Verified answer
Answer:
Take note that ionization energy is the amount of energy required for an atom to lose an electron. Atomic radius is the size of an atom from its nucleus.