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Which of the following statement (s) is (are) correct ? a. The electronic configuration of Cr is [Ar] 3d5 4s1. (Atomic number of Cr = 24). b. The magnetic quantum number may have a negative value. c. In silver atom, 23 electons have a spin of one type and 24 of the opposite type. (Atomic number of Ag = 47). d. The oxidation state of nitrogen in HN3 is – 3.

Which of the following statement (s) is (are) correct ?
a. The electronic configuration of Cr is [Ar] 3d5 4s1. (Atomic number of Cr = 24).
b. The magnetic quantum number may have a negative value.
c. In silver atom, 23 electons have a spin of one type and 24 of the opposite type. (Atomic number of Ag = 47).
d. The oxidation state of nitrogen in HN3 is – 3.

Grade:upto college level

1 Answers

Deepak Patra
askIITians Faculty 471 Points
9 years ago
Sol. (a) Cr = [Ar] = 3d5 4s1, an exception to aufbau principle. (b) For a given value of l, m can have any value from –l to +l, so can have negative value. (c) Ag is in copper group with d10s1 configuration, ie, 46 electrons are spin paired.

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