The set of quantum numbers for the 19^{th} el | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The atomic number of chromium $(Cr)$ is $24$.Its electronic configuration is $[Ar] 3d^5 4s^1$.The order of filling electrons according to the Aufb

Vedclass · Accepted Answer

$n = 4, l = 0, m = 0, s = +1/2 	ext{ or } -1/2$

Vedclass · Answer

(A) The atomic number of chromium $(Cr)$ is $24$.Its electronic configuration is $[Ar] 3d^5 4s^1$.The order of filling electrons according to the Aufbau principle is $1s, 2s, 2p, 3s, 3p, 4s, 3d$.The first $18$ electrons fill the argon core $(1s^2 2s^2 2p^6 3s^2 3p^6)$.The $19^{th}$ electron enters the $4s$ orbital.For the $4s$ orbital,the principal quantum number $n = 4$ and the azimuthal quantum number $l = 0$.Since $l = 0$,the magnetic quantum number $m = 0$.The spin quantum number $s$ can be $+1/2$ or $-1/2$.

The set of quantum numbers for the $19^{th}$ electron in chromium $(Cr)$ is:

Similar Questions

Which of the following compounds is optically active?

The $24$ hour (diurnal) rhythm of our body,such as the sleep-wake cycle,is regulated by the hormone:

If $\frac{(x - 1)^2}{x^3 + x} = \frac{A}{x} + \frac{Bx + C}{x^2 + 1}$,then

Olefins can be hydrogenated by

If $a_1, a_2, \dots, a_n$ are positive real numbers whose product is a fixed number $c$,then the minimum value of $a_1 + a_2 + \dots + a_{n-1} + 2a_n$ is

Vedclass Test Series

Exam Paper Generator

Online Exam Module