JAMB Chemistry 2021 Objective — Question 13

Question 13 of 41 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2021 Objective paper, with the correct answer and a full explanation.

Arrange the following in decreasing order of ionisation energy: Be, N, C, Li

A. Be, N, C, Li
B. N, C, Be, LiCorrect
C. Li, Be, C, N
D. C, Be, N, Li

Explanation

Across period 2: Li < Be < B < C < N (with slight anomaly: N > O due to half-filled stability). Decreasing IE: N > C > Be > Li.

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