Use the periodic table to predict the most stable oxidation state for the following element: Ca
A) +1
B) +2
C) +3
D) -1
E) -2

Question

Quizplus · Accepted Answer

Calcium is a Group 2 (or alkaline earth) metal, which indicates that it has two valence electrons. Therefore, the most stable oxidation state for calcium would be when it loses both of these electrons to form a Ca2+ ion, giving it a +2 oxidation state.

Use the Periodic Table to Predict the Most Stable Oxidation