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NEETChemistryStructure of Atom

Which of the following statements are correct? (A) The electronic configuration of Cr is Ar 3 d 5 4 s 1 . (B) The magnetic quantum number may have a negative value. (C) In the ground state of an atom, the orbitals are filled in order of their increasing energy order. (D) The total number of nodes are given by n - 2 . Choose the most appropriate answer from the options given below.

Options

  1. AA , C & D only
  2. BA & B only
  3. CA & C only
  4. DA , B & C only

Correct answer

D. A , B & C only

Step-by-step solution

(A) Cr = Ar 3 d 5 4 s 1 (B) m = - l to + l means the magnetic quantum number may have negative values. (C) According to Aufbau principle, orbitals are filled in order of their increasing energies. (D) Total nodes = n - 1

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