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

Correct answer: D. (A), (B) and (C) only (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

JEE Main 202229 JuneMorning Shift

Exam: JEE Main
Year: 2022
Date: 29 June
Shift: Morning Shift
Subject: Chemistry
Chapter: Structure of Atom

JEE Main 2022 · 29 June · Morning Shift · Chemistry · Structure of Atom

Which of the following statements are correct? (A) The electronic...

Which of the following statements are correct?

(A) The electronic configuration of $Cr$ is \left[Ar\right]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

A $\left(A\right), \left(C\right) \text{ and } \left(D\right)$ only
B\left(A\right) \text{ and } $\left(B\right)$ only
C\left(A\right) \text{ and } $\left(C\right)$ only
D $\left(A\right), \left(B\right) \text{ and } \left(C\right)$ only

Correct answer

D. $\left(A\right), \left(B\right) \text{ and } \left(C\right)$ only

Step-by-step solution

(A) $Cr = \left[Ar\right]3{d}^{5}4{s}^{1}$

(B) $m = - l$ to $+ l$ means the magnetic quantum number may have negative values.

(D) Total nodes $= n - 1$

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