Question

Which one of the following atoms is smaller in size?

• A. F
• B. O
• C. N
• D. C

Hint:

In a period, atomic size decreases as we move from left to right.

Answer 1

The Correct Option is A

Fluorine (F) has the smallest size among the given elements because as we move across a period from left to right, the atomic size decreases due to an increase in effective nuclear charge. Thus, fluorine, being the rightmost in the period, has the smallest atomic size.