Post-UTME Chemistry 2005 Objective — Question 13

Question 13 of 27 from the Post-UTME Screening (Post-UTME) Chemistry 2005 Objective paper, with the correct answer and a full explanation.

Which of the following atoms A,B,C and D would readily form an ion with a charge of 2? Mass No.: (a)12 (b)16 (c)24 (d)31; Atomic No.: (a)6 (b)8 (c)12 (d)15

A. 12, 6
B. 16, 8
C. 24, 12Correct
D. 31, 15

Explanation

An atomic number of 12 (magnesium, a group 2 metal) readily loses 2 electrons to form a 2+ ion.

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