JAMB Chemistry 2023 Objective — Question 23

Question 23 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2023 Objective paper, with the correct answer and a full explanation.

Which of the following qualifies elements in the same period?

A. Equal number of valence electrons
B. Equal number of shellsCorrect
C. Equal number of neutrons
D. Equal nuclear energy

Explanation

Elements in the same period have the same number of electron shells (energy levels). Elements in the same group have the same number of valence electrons.

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