Transition and InnerTransition Elements - Result Question 46
46. Which of the following statement (s) is/are correct?
(1998)
(a) The electronic configuration of Cr is [Ar] $3 d^5 4 s^1$ (Atomic number of $\mathrm{Cr}=24$ )
(b) The magnetic quantum number may have a negative value
(c) In silver atom, 23 electrons have a spin of one type and 24 of the opposite type (Atomic number of $\mathrm{Ag}=47$ )
(d) The oxidation state of nitrogen in $\mathrm{HN}_3$ is -3
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Answer:
Correct Answer: 46. (a, b, c, d)
Solution: $\mathrm{Cr}:[\mathrm{Ar}] 3 d^5 4 s^1$
Magnetic quantum number : $-l \ldots \ldots 0 . \ldots \ldots+l$.
$\operatorname{Ag}\left(4 d^{10} 5 s^1\right)$ All paired electrons have opposite spin. The last one has unpaired spin.
BETA
