-- card: 37446 from stack: in
-- bmap block id: 0
-- flags: 0000
-- background id: 14320
-- name: Ac


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Ac

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Actinium

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89

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227.0278

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1050

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3200

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+3

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(Gr. aktis, aktinos, beam or ray) Discovered by Debierne in 1899. Found in radiaoctive ores. Actinium is 150 times as radioactive as radium.

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radioactive, rare earth metal, alpha emitter

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source of neutrons

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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  14  2    6  10         2    6   1         2