Which of the following electronic configurati | vedclass

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

Question

(D) According to the Aufbau principle,electrons fill orbitals in order of increasing energy. In option $D$,the configuration $1s^2 2s^2 2p^2 3s^1$ is

Vedclass · Accepted Answer

$1s^2 2s^2 2p^2 3s^1$

Vedclass · Answer

(D) According to the Aufbau principle,electrons fill orbitals in order of increasing energy. In option $D$,the configuration $1s^2 2s^2 2p^2 3s^1$ is incorrect because the $2p$ subshell can hold up to $6$ electrons. Before an electron can occupy the $3s$ orbital,the $2p$ subshell must be filled to its capacity. Therefore,the correct configuration for an atom with $7$ electrons would be $1s^2 2s^2 2p^3$.

Which of the following electronic configurations is not possible?

Similar Questions

The image of the point $(1, 2, -1)$ on the plane containing the line $\frac{x+1}{-3}=\frac{y-3}{2}=\frac{z+2}{1}$ and the point $(0, 7, -7)$ is:

Which of the following vessels carries the most oxygenated blood?

$AlCl_3$ is:

How many geometrical isomers are possible for the compound shown below?

The cathode of a photoelectric cell is changed from a work function $W_1$ to $W_2$ $(W_2 > W_1)$. If the photoelectric currents before and after the change are $I_1$ and $I_2$ respectively,and all other conditions remain constant,then which of the following is true? (Assume $hv > W_2$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module