If we take away two electrons from the outer shell of calcium, it would have the same electron configuration as what element
A) Argon
B) Titanium
C) Stronium
D) Magnesium
E) None of the above

Question

Quizplus · Accepted Answer

When calcium loses two electrons from its outer shell, it becomes a Ca2+ ion with an electron configuration of [Ar]. This is the same electron configuration as the noble gas element Argon, which has a full outer shell of electrons. Therefore, the correct choice is A) Argon.

If We Take Away Two Electrons from the Outer Shell