Calcium

 =Calcium=


 * Atomic Number:**20


 * Protons:** 20 


 * Electrons:** 20 


 * Neutrons:** 20 


 * Average Atomic Mass:** 40.078 amu


 * Isotopes:** Ca-40, Ca-41, Ca-42, Ca-43, Ca-44, Ca-45, Ca-46, Ca-47, Ca-48, Ca-49, Ca-50, Ca-51
 * Discovery:**  Calcium was discovered by Sir Humphrey Davy. He discovered this in the country of England in 1808.


 * Name:** The name Calcium comes from the Latin word "//calx//" meaning "//lime//"
 * Uses:** Calcium is used in magnets and cement. Calcium is also an important mineral for strong bones and teeth.


 * Interesting Facts**: Calcium is silvery-white and is very soft. Calcium is the in the earth's crust and is the fifth element in the earth. Calcium is in our bones and in our teeth. We have calcium in our body so that our nerves can function.

media type="youtube" key="Jcvac9__YN4" height="344" width="425" 
 * Video:**

<span style="color: rgb(0, 0, 0);"><span style="color: rgb(255, 0, 0);">
 * Sources**
 * <span style="color: rgb(0, 0, 0);"> Photo: [|Forensic Lab by cwalker71 on Flickr]<span style="color: rgb(255, 0, 0);">
 * Video: [|Calcium from the Periodic Table of Videos on YouTube]
 * [|Calcium on WebElements]
 * [|Calcium Isotopes on WebElements]
 * [|Uses of Calcium on WebElements]