Which of the following elements has the least | vedclass

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

Question

(A) The electronic configurations of the given elements are as follows:$K (Z=19): 1s^2, 2s^2 2p^6, 3s^2 3p^6, 4s^1$. The $M$ shell $(n=3)$ has $2+6 =

Vedclass · Accepted Answer

$K$

Vedclass · Answer

(A) The electronic configurations of the given elements are as follows:$K (Z=19): 1s^2, 2s^2 2p^6, 3s^2 3p^6, 4s^1$. The $M$ shell $(n=3)$ has $2+6 = 8$ electrons.$Mn (Z=25): 1s^2, 2s^2 2p^6, 3s^2 3p^6 3d^5, 4s^2$. The $M$ shell $(n=3)$ has $2+6+5 = 13$ electrons.$Ni (Z=28): 1s^2, 2s^2 2p^6, 3s^2 3p^6 3d^8, 4s^2$. The $M$ shell $(n=3)$ has $2+6+8 = 16$ electrons.$Sc (Z=21): 1s^2, 2s^2 2p^6, 3s^2 3p^6 3d^1, 4s^2$. The $M$ shell $(n=3)$ has $2+6+1 = 9$ electrons.Comparing the number of electrons in the $M$ shell: $K (8) Thus, $K$ has the least number of electrons in its $M$ shell.

Which of the following elements has the least number of electrons in its $M$ shell?

Similar Questions

Maximum number of electrons in a subshell with $n=4$ and $l=3$ is

How many electrons in an atom can have the following quantum numbers?
$(a)$ $n = 4, m_s = -\frac{1}{2}$
$(b)$ $n = 3, l = 0$

The Aufbau principle is obeyed in which of the following electronic configurations?

If $l = 3$,what is the number of orbitals and their type?

Vedclass Test Series

Exam Paper Generator

Online Exam Module