Question

ccc patterns compare the trends for atomic size and first ionization energy. explain why these trends are related.

Explanation:

Atomic size and first ionization energy are inversely related. As atomic size increases (down a group), the outermost electrons are farther from the nucleus and less strongly attracted, so first ionization energy decreases. Across a period, atomic size decreases (due to increased nuclear charge attracting electrons more strongly), and first ionization energy generally increases as electrons are more tightly held.

Answer:

Atomic size and first ionization energy trends are inversely related. Down a group, larger atoms have lower first ionization energy (electrons less tightly held). Across a period, smaller atoms have higher first ionization energy (electrons more tightly held).