s-Block ElementsHard
Question
Which of the following has maximum ionisation energy ?
Options
A.Ba → Ba+ + e-
B.Be → Be+ + e-
C.Ca → Ca2+ + 2e-
D.Mg → Mg2+ + 2e-
Solution
Down the group size increases and therefore, attraction between valence shell electron and nucleus decreases and thus ionisation energy decreases.
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