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15 January, 23:18

In which orbitals would the valence electrons for selenium (Se) be placed?

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  1. 16 January, 00:13
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    Selenium falls in the same column with oxygen therefore it has the same number of valence electrons with oxygen which is 6. It fills the 3d orbital but only 4s and 4p are counted. The electronic configuration is [Ar]3d^10 4s^2.
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