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Correct order of first IP among following elements Be, B, C, N, O is
Options
(a) B< Be < C
Correct Answer:
B< Be < C
Be – 1s²2s²; B – 1s²2s²2p¹; C – 1s²2s²2p²;N – 1s²2s²2p³;O – 1s²2s²2p⁴. IP increases along the period. But IP of Be > B. Further IP of O < N because atoms with fully or partly filled orbitals are most stable and hence have high ionisation energy.
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Question Type: Memory
(964)
Difficulty Level: Easy
(1008)
Topics: Classification of Elements and Periodicity
(94)
Subject: Chemistry
(2512)
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