1.

Which configuration represents a noble gas:

Answer»

`1s^2,2s^2,2p^6,3s^2`
`1s^2, 2s^2,2p^6, 3s^5`
`1s^2, 2s^2,2p^6,3s^2,3p^6`
`1S^2, 2S^2,2p^6, 3S^2,3p^6,3d^10, 4s^2`

ANSWER :C


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