Question

the aromic radii of 3 elements a b c of a periodic table are186pm,104pm and 143pm respectively giving a reason ,arrange these elements in the increasing order of atomic number in the period

Answer 1

The order will be b, c&a because as we down the group in modern periodic table the atomic radius increases so first the element with atomic radius 104pm will come then with 143pm and then with 186pm
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