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Grade upto college level Physical Chemistry

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.

Shane Macguire

12 Years agoGrade upto college level

1 Answer

Deepak Patra

12 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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