What is the most metallic element in period 3?
May 10, 2020· Calcium. The chemical element Calcium (Ca), atomic nuer 20, is the fifth element and the third most abundant metal in the earth''s crust. The metal is trimorphic, harder than sodium, but softer than aluminium. A well as beryllium and aluminium, and unlike the alkaline metals, it doesn''t cause skin-burns.