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Transcript of Calcium
Discovery and Basics
Date of Discovery: 1808
Discoverer: Sir Humphrey Davy
Name Origin: From the latin word calcis (lime)
Number of Energy Levels: 4
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 8
Fourth Energy Level: 2
Calcium is an ingredient in leaves, bones, teeth, and shells.
Calcium is the fifth most abundant element in the earth's crust.
Stalagmites and stalactites contain Calcium carbonate
Calcium Carbonate is important in the cement industry.
The metal is rather reactive.
On the Periodic Table
Calcium and us
Calcium is essential for all life. It forms part of cell walls, strengthens our bones, and is important for blood clotting.
Properties and Uses
--Atomic number of 20
--Atomic mass of 40.08 grams
--Melting point of 1544 Fahrenheit
--6 stable isotopes
--Electron Configuration [ Ar ] 4s2
--Used to strengthen bones
--Calcium Sulfate is used as a building plaster
--Calcium Hydroxide is used as blackboard chalk
--Calcium carbonate is used as an antacid for heartburn
--Calcium from limestone is a component of Portland cement