Practice question

MCQ

Question

Arrange the following elements in order of decreasing second ionization enthalpy: Li, Be, B, C.

Choose one · Correct answer highlighted

C > B > Be > Li Li > Be > B > C Correct Be > Li > C > B B > C > Li > Be

Second ionization enthalpy is highest for Li (removing e⁻ from Li+ with 1s²) and decreases across period 2 as stability reduces: Li > Be > B > C.

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