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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_25703.txt
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1988-07-08
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1KB
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59 lines
-- card: 25703 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 2680
-- name:
-- part contents for background part 8
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Praseodymium
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59
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Pr
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140.92
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2-8-18-21-8-2
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6.77
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919° C
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3020° C
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+3
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HCP, BCC
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soft silvery metal (tarnishes green in air)
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yellow glass, carbon arcs, metal alloys
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It occurs naturally with other rare earths in monazite.
Discovered in 1885 by Welsbach.