Question

Which element has the smallest atomic radius?

A. С
B. О
C. Ве

Answer 1

B - O

Step-by-step explanation:

Carbon - 170 pm

Oxygen - 60 pm

Beryllium - 112 pm

Answer 2

We know that atomic radius decreases from left to right within a period due to the increase in effective nuclear charge. Since C comes before O in the second period, O will have a smaller atomic radius than C .