![]() ![]() Calcium does not occur as the metal itself in nature and instead is found. Calcium is the fifth most abundant element in the earth's crust and makes up more than 3 of the crust. ![]() atomic radius of a magnesium atom is smaller. ![]() Calcium is an essential constituent of leaves, bones, teeth, and shells. The elements calcium and strontium have similar chemical properties because they both. Periodic Table of Elements - Sorted by Atomic Radius. Calcium as the element is a grey silvery metal. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). If you need to cite this page, you can copy this text: alkaline-earth metal, any of the six chemical elements that comprise Group 2 (IIa) of the periodic table. ![]()
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