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Neutral Atoms Electron Configurations

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1. Which of the following electron configurations of neutral atoms represent excited stats?
__ (Ar)4s^2 3d^3
__ 2s^2
__ (Kr)5s^14d^5
__ 1s^2 2s^2 2p^6 3s^2 3p^6 3d^2
__ (Xe)6s^2 4f

2. Which neutral atoms have the following electron configurations. Name the symbol.
___________________ (Ar)4s^2 3d^3
___________________ 1s^2 2s^2 2p^6 3s^2 3p^6 3d^2

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The expert examines neutral atoms for electron configurations.

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