Question

F, N, B, Be are elements of second period in the periodic table. which of these elements has least atomic size
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Answer 1

Answer:

Fluorine

Explanation:

As we move from left to right, atomic size decreases because of increase in nuclear charge but no change in the shells. Hence, Last element will be the smallest element in the period. Hence, fluorine has small radius in the second period. Noble gases are exception to this property.