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What happens to the size of an atom as you move down the periodic table?
A. The atomic radius varies within different groups.
B. The atomic radius stays the same.
C. The atomic radius increases.
D. The atomic radius decreases.

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Answer:

D

Explanation:

Atomic radius is the distance from the atom's nucleus to the outer edge of the electron cloud. In general, atomic radius decreases across a period and increases down a group. Across a period, effective nuclear charge increases as electron shielding remains constant.

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