Which of the following statement (s) is (are) correct? (1998)

Chemistry · JEE Advanced · NTA Exams — Atomic Structure

1. The electronic configuration of Cr is [Ar] 3d⁵ 4s¹. (Atomic number of Cr = 24).
2. The magnetic quantum number may have a negative value.
3. In silver atom, 23 electrons have a spin of one type and 24 of the opposite type. (Atomic number of Ag = 47).
4. The oxidation state of nitrogen in HN₃ is –3 .

Answer

(A) The electronic configuration of Cr is [Ar] 3d 5 4s 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).

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