Ionization energy increases across the period in the periodic table because
CHEMISTRY
WAEC 2022
Ionization energy increases across the period in the periodic table because
- A. atomic number increases
- B. effective nuclear charge increases
- C. mass number decreases
- D. screening effect decreases
Correct Answer: B. effective nuclear charge increases
Explanation
As the nuclear charge increases, its attraction for the outermost electron increases and so more energy is required to remove the outermost electron. Hence, the ionization energy increases.
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