-- card: 30914 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 14320
-- name: Cs


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Cs

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Cesium

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55

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132.9054

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1.873

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28.40

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669.3

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+1

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(L. caesius, sky blue) Discovered by Bunsen and Kirchhoff in 1860. Found in lepicolite, pollucite ( silicate of aluminum and cesium). The most alkaline and electropositive element. Liquid at room temp., along with mercury and gallium. Cesium hydroxide is the strongest base known.


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silvery white, soft, ductile, alkali metal, highly reactive, low melting point (melts in your hands and will also burn a hole in them)

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coating for light sensitive photoelectric cells, ion propulsion systems, catalyst in hydrogenation reactions, used in atomic clocks

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0.235

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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   10   2   6  10        2    6               1