JAMB Chemistry 2012 Objective — Question 12

Question 12 of 50 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2012 Objective paper, with the correct answer and a full explanation.

Two elements, X and Y are in the same group on the periodic table because they both have the same

A. number of electronic shells
B. number of valence electronsCorrect
C. atomic size
D. atomic number

Explanation

Elements in the same group have the same number of valence (outermost) electrons.

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