Question:
Arrange the following elements in increasing order of their atomic radii.
Solution:
(a) All the elements belong to the same period (second). The atomic size or radius decreases along a period. Therefore, increasing order of
atomic
radii is : F < N < Be < Li
(b) The listed elements are present in group 17 (halogen family). The atomic size or radius increases down
a group. Therefore, the correct increasing order of atomic radii is : Cl < Br < I < At.
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