Question

Atomic radii from top to bottom in a periodic table:

• A. increases
• B. decreases
• C. is constant
• D. none of the above

Answer 1

Answer: (A)

increases

The number of energy levels increases as you move down a group as the number of electrons increases. Each subsequent energy level is further from the nucleus than the last. Therefore, the atomic radius increases as the group and energy levels increase. .