Calcium is an element in the human body. It was discovered in 1808 by Humphry Davy. Humphry Davy was a chemist and an inventor. Calcium is a chemical on the Periodic Table with the symbol Ca and atomic number 20. Calcium is a soft gray alkaline earth metal, it is the fifth-most-abundant element by mass in the Earth 's crust. The element calcium ion is also the fifth-most-abundant dissolved ion in seawater. Free calcium metal is too reactive to occur in nature or it is natural. Calcium is produced in supernova nucleosynthesis. Supernova nucleosynthesis is the theory of the production of many different chemical elements in Supernova explosions. The atomic mass of calcium is 40.078. The density of calcium is 1.55 g/L. This is the Melting point 1112 K and Boiling point 1757 K for calcium.The shell structure is 2,8,8,2. …show more content…
The number of valence electrons in calcium is 2. calcium isn 't just used for making strong bones. It is used to make the cement on sidewalks, cheese,and removing nonmetal from different metal mixes (called alloys,) and also it is used as an agent in the making of other metals. As you can, we might be looking at calcium and not know it. Pure calcium is actually a metal, and reacts very strongly, and sometimes it may violently explode with water and acids. The best sources of calcium in the American diet are milk, yogurt, and cheese. Nearly 72% of the calcium in the US comes from dairy foods. Calcium makes up the hard outer covering of bones in the human body, and gives them their strength. The insides of bones are very spongy, and full of holes, which makes these bones very light. There are lots of things calcium gives us. There is even more this element can do for you. Calcium plays a very important role in many bodily functions. It helps build stronger, more dense bones and keeps bones healthy later in