Among the elements from atomic number 1 to 36 | vedclass

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

Question

(D) The elements with an unpaired electron in their $s$-subshell are those that have an $ns^1$ configuration in their ground state.These include the a

Vedclass · Accepted Answer

$06$

Vedclass · Answer

(D) The elements with an unpaired electron in their $s$-subshell are those that have an $ns^1$ configuration in their ground state.These include the alkali metals $(H, Li, Na, K)$ and elements where an electron is promoted to the $s$-subshell to achieve stability,such as $Cr$ $([Ar] 3d^5 4s^1)$ and $Cu$ $([Ar] 3d^{10} 4s^1)$.Thus,the elements are $H$ $(Z=1)$,$Li$ $(Z=3)$,$Na$ $(Z=11)$,$K$ $(Z=19)$,$Cr$ $(Z=24)$,and $Cu$ $(Z=29)$.Total number of such elements is $6$.

Among the elements from atomic number $1$ to $36$,the number of elements which have an unpaired electron in their $s$-subshell is

Similar Questions

Chromium has the electronic configuration $4s^1 3d^5$ rather than $4s^2 3d^4$ because

Which of the following orbitals has two angular nodes?

How many unpaired electrons are present in the $Ni^{2+}$ cation (atomic number $= 28$)?

Which one of the following configurations represents a noble gas?

$2p$ orbitals have

Vedclass Test Series

Exam Paper Generator

Online Exam Module