What is the electronic configuration of calcium? 3s2 3p2 b) 4s2 c) 4s2 3d5 d) 4s2 3d3
Correct Answer: Ne
Calcium is one of the most common elements found in minerals, vitamins, and oxide rocks. It is an alkali earth metal and reacts strongly with water. It has 20 electrons and filling these into shells using Aufbau principle gives an electronic configuration of 4s2.