InterviewSolution
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InterviewSolution
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The correct order in which the first ionisation potential increases isA. K, Be, NaB. Be, Na, KC. Na, K, BeD. K, Na, Be |
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Answer» Correct Answer - D The electronic configuration of the elements are `._(4)Be-1s^(2)2s^(2)` `._(11)Na-1s^(2)2s^(2)2p^(6)3s^(1)` `._(19)K-1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)` The first ionisation energy of Be is maximum because electron is to be drawn from stable (fully filled) orbital. The `I^(st)` ionisation energy of Na is greater than K because size of the K is bigger than Na which facilitates easy removal of electron from its outermost shell. So, the sequence is `KltNaltBe`. |
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