Transition and InnerTransition Elements - Result Question 146
####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 $Cr=24$ )
(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 $Ag=47$ )
(d) The oxidation state of nitrogen in $HN _3$ is -3
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Answer:
Correct Answer: 46. (a, b, c, d)
Solution:
- $Cr$ : $[Ar] 3 d^{5} 4 s^{1}$
Magnetic quantum number : $-l \ldots \ldots .0 \ldots \ldots+l$.
$\operatorname{Ag}\left(4 d^{10} 5 s^{1}\right) \quad$ All paired electrons have opposite spin. The last one has unpaired spin.
