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What element is represented by this electron ground state configuration

4d^10 4f^14 5s^2 5p^6 5d^10 5f^14 6s^2 6p6 6d^2 7s^2

How do I figure this out

  • Chemistry -

    There is more than one way to do this but I think the simplest is to recognize that the 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 levels are full. If you count that up it adds to 36. I would, with my handy dandy calculator add the electrons shown (start with 36) and look up the atomic number on the periodic table for total electrons.

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