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Slide 2 By: Ashlee http://www.dayah.com/pe riodic/ Slide 3 Silvery white metallic Metal Conductor Corrosive Melting point: 839.0 C Boiling point: 1484.0 C Slide 4 Structure: Ccp( Cubic Closed- Pack) Slide 5 Atomic number:20 Atomic weight:40.08 Protons:20 Neutrons:20 Symbol: Ca Slide 6 Block: S Period: 4 Group: 2 Electron Configuration: [Ar].4s 2 Slide 7 Can be obtained from: Chalk, limestone and marble. Is found in 3.5% of Earths crust. Bones, teeth and shells are formed by calcium. Slide 8 found as calcium sulfate in alabaster and gypsum, calcium fluoride in fluorite, or as calcium phosphate in rock phosphate Slide 9 In nature, calcium is found in rocks, chalk and seashells. It is found in the bones, muscles and nerves of many animals and plants. Calcium is abundant. Slide 10 Its has a slightly grayish appearance when it is first cut. Then the air tarnishes it to show a duller finish. Reacts with water. Slide 11 Its compounds are used to make plaster, and metallurgic and electronic materials. http://www.yout ube.com/watch ?v=HSV3jOccyY s