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Q 3163101945.     (i) Name the most metallic element in second
period and most non-metallic element.
(ii) Name the element with (a) largest atomic
radius, (b) smallest atomic radius in third period.
(iii) Name the element having general electronic
configuration `ns^2 np^4` in fourth period.
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)