Which of the following statement(s) is/a...

Which of the following statement(s) is/are correct ?

The electronic configuration of Cr is `[Ar] 3d^(2) 4s^(1)` (Atomic number of Cr = 24)

The magnetic quantum number may have a negative value

In silver atom, 23 electrons have a spin of one type and 24 of the opposite type (Atomic number of Ag = 47)

The oxidation state of nitrogen in `HN_(3)` is `-3`

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The correct Answer is:

B, C

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