Question: Why do atomic radii increase going down a group of the periodic table? (a) Atomic radii increase going down a group because the electron shells

Why do atomic radii increase going down a group of the periodic table?

(a) Atomic radii increase going down a group because the electron shells are farther away from the nucleus.

(b)Atomic radii increase going down a group because the nuclear charge increases.

(c) Atomic radii increase going down a group because the quantum number increases.

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