1S²,2S² 2p⁵
1S²,2S² 2P⁶,3S¹
1S²,2S² 2P⁶,3S² 3P⁶,4S²
a) which element shows different oxidation state?
b) which among those have hig electronegativity?
c) which element has greater atomic radius?
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Explanation:
a)3rd element show different oxidation states.
b) 1st element has higher electronegativity.
c) 3rd element has greatest atomic radii.
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