1. Tardigrade
  2. Question
  3. Chemistry
  4. 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 energies. (D) The total number of nodes are given by n -2. Choose the most appropriate answer from the options given below:

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Q. 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 energies.
(D) The total number of nodes are given by $n -2$.
Choose the most appropriate answer from the options given below:

JEE MainJEE Main 2022Structure of Atom

Solution:

(A) $Cr =[ Ar ] 3 d ^{5} 4 s ^{1}$
(B) $m=-\ell$ to $+\ell$
(C) According to Aufbau principle, orbitals are filled in order of their increasing energies.
(D) Total nodes $= n -1$