Which of the following atoms of elements is most likely to form a 2+ ion?
A) Scandium
B) Calcium
C) Aluminum
D) Oxygen
E) Fluorine

Question

Quizplus · Accepted Answer

Calcium has two valence electrons in its outermost shell and will lose both to form a 2+ ion, while Scandium has three valence electrons and will lose three to form a 3+ ion, Aluminum has three valence electrons and will lose three to form a 3+ ion, Oxygen has six valence electrons and will gain two to form a 2- ion, and Fluorine has seven valence electrons and will gain one to form a 1- ion.

Which of the Following Atoms of Elements Is Most Likely