-- card: 19437 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 14320
-- name: Ca


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Ca

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Calcium

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20

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40.08

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1.55

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silver metal, hard, alkaline earth metal, forms white coating of nitride in air, reacts with water

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839

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1484

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+2

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(L. calx, lime) Lime was prepared by the Romans during the first century and discovered in 1808 by Davy. Ca is fifth in abundance i the earth's crust. Calcium does not occur free in nature. Found mostly as limestone, gypsum and fluorite. The formation of caves with stalagmites and stalictites is due to the solution of carbonate in water containing carbon dioxide.

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essential to teeth and bones, found in leaves and shells, used as a reducing agent for preparing other metals, alloying agent for various metals, component of cement and mortar and plaster

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0.174

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Electron Configuration:

1s  2s  2p  3s  3p  3d  4s  4p  4d  4f  5s  5p  5d  5f  6s  6p  6d  6f  7s 
 2   2    6    2    6         2