Question

1. atomic radius generally increases when you move ______ in a group. (page: explaining atomic radius) a. up b. down c. sideways

Explanation:

Atomic radius increases down a group because each element adds a new electron shell, increasing the distance between the nucleus and valence electrons. Moving up a group decreases the radius, and sideways (across a period) generally decreases it due to increased nuclear charge.

Answer:

B. down