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Macademic for Students & Teachers
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Macademic for Students and Teachers (Quantum Leap)(1992).iso
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Sciences
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card_9541.txt
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1988-07-08
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1KB
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60 lines
-- card: 9541 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2680
-- name:
-- part contents for background part 8
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CALCIUM
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20
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Ca
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40.08
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2-8-8-2
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1.55
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838° C
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1440° C
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+2
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FCC
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silvery-white, moderately hard metal
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plaster, quick-lime, Portland cement, electronic materials, food suppliments
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A basic component of bone, shells, and leaves. Calcium occurs naturally in limestone, gypsum and fluorite. It constitutes approximately three percent of the earth's crust. Discovered in 1808 by Davy.