-- card: 19193 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 14320
-- name: K


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K

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Potassium

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19

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39.0983

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0.862

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63.25

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760

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+1

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(Eng. potash, pot ashes; L. kalium) Discovered in 1807 by Davy. The seventh most abundant  on earth and makes up about 2.4% of the earth's crust. Found extensively as potash (KOH), mined in Germany, U.S. and elsewhere. Lighter than all metals except lithium. 

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alkali metal, highly reactive (especially water), not found free in nature, nine known isotopes, silver metal

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fertilizers, essential to plant growth

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0.196

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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    1