8. Which of the given atoms has the smallest atomic radius? Provide an explanation

a. Bi

b. P

C. N

d. As

C. N

Explanation:

Bi - period 6, 6 electron levels

P - period 3, 3 electron levels

N - period 2, 2 electron levels

As - period 4, 4 electron levels

N has only 2 levels of electrons, so it has smallest atomic radius.