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01/10/2020 4:04 pm
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Sodium forms Na+ ion but it does not form Na2+ because of
(a) very low value of 1st and IInd I.E.
(b) very high value of Ist and IInd I.E.
(c) high value of Ist I.E. and low value of IInd I.E.
(d) low value of Ist I.E. and high value of IInd I.E
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01/10/2020 4:08 pm
(d) low value of Ist I.E. and high value of IInd I.E
Explanation:
Na (Z = 11; 1s2, 2s22p6 , 3s1) readily gives one electron because the resulting Na+ (1s22s22p6) has stable configuration. Thus the first IE of Na is less. However, removal of an electron from a stable (noble gas) configuration requires high energy and thus IE2 of Na will be very high.