2. As elements go down a group, they have a whole additional energy level of electrons more than the
element above them in the periodic table. Does atomic
size increase or decrease down a group?

Increases

Explanation:

Atomic size is the amount of space between the nucleus of an atom and the outermost electron. So, as each additional energy level is added, the overall amount of space between the nucleus and the outermost electron increases because there is now an extra shell of electrons that is farther out.

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