JEE Mains · Chemistry · STD 12 - 4. d and f- block elements
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 ....
- A \((A), (C)\) and \((D)\) only
- B \((A)\) and \((B)\) only
- C \((A)\) and \((C)\) only
- D \((A), (B)\) and \((C)\) only
Answer & Solution
Correct Answer
(D) \((A), (B)\) and \((C)\) only
Step-by-step Solution
Detailed explanation
\((A)\) \(Cr =[ Ar ] 3 d ^{5} 4 s ^{1}\) \((B)\) \(m =-\ell\) to \(+\ell\) \((C)\) According to Aufbau principle, orbitals are filled in order of their increasing energies. \((D)\) Total nodes \(=n-1\)
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