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

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The oxidation state of nitrogen in $H N_{3}$ is $- 3$ .

In silver atom, 23 electrons have a spin of one type and 24 of the opposite type

Cr is a representative element

The electronic configuration of Cr is $(A r) 3 d^{4} 4 s^{2}$ (Atomic number of Cr = 24)

answer is C.

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Detailed Solution

The electronic configuration of Cr is $(A r) 3 d^{5} 4 s^{1}$ and it is a representative element. In $H N_{3}$ . Oxidation state of nitrogen is $- \frac{1}{3}$ .

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