Electronic configuration of Cu(Z = 29) is - Vidyadip

MCQ

Electronic configuration of $Cu(Z = 29)$ is

A
$[Ar]3{d^9}4{s^2}$
✓
$[Ar]3{d^{10}}4{s^1}$
C
$[Ar]3{d^5}4{s^2}$
D
$[Ar]3{d^6}4{s^2}$

✓

Answer

Correct option: B.

$[Ar]3{d^{10}}4{s^1}$

b
(b)The expected electronic configuration of $ Cu (29)$ is $[Ar]\;3{d^9}4{s^2}$ but actually it is found to be $[Ar]\;3{d^{10}}4{s^1}$. This is because fully filled $d$ orbitals are more stable than incompletely filled $d-$ orbitals. So there is a migration of one ${e^ - }$, from $4s $ orbital to $3d$ orbital to give a more stable configuration.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 4. d and f- block elements→4. d and f- block elements — all question types→Chemistry STD 12 Science question papers→CBSE Board STD 12 Science question papers→CBSE Board question paper generator→

Similar questions

The molal elevation constant is the ratio of the elevation in B.P. to

For ${C_6}{H_5}CHO$ which of the following is incorrect

What are the functional groups present in the structure of maltose $?$

$4L$ of $0.02M$ aqueous solution of $\text{NaCl}$ was diluted by adding one litre of water. The molality of the resultant solution is $.......$

Calculate $\Lambda _{HOAc}^\infty $ using appropriate molar conductances of the electrolytes listed above at infinite dilution in ${H_2}O$ at $25\,^o\, C$

Electrolyte :	$KCl$	$KNO_3$	$HCl$	$NaOAc$	$NaCl$
$\Lambda ^\infty (Scm^2mol^{-1}) $:	$149.9$	$145.0$	$426.2$	$91.0$	$126.5$

Method by which lyophobic sol can be protected.

The rate constant for the reaction $2N_2O_5 \to 4NO_2 + O_2$ is $3.0\times10^{-5}\, sec^{-1}$. If rate is $2.40\times10^{-5}\, M\, sec^{-1}$, then the concentration of $N_2O_5$ (in $M$) is ?

What is the major product.of the following reaction ?

$C{H_3} - C \equiv N\xrightarrow[{E{t_2}O}]{{C{H_3}Mgl}}\xrightarrow{{{H_3}{O^ \oplus }}}$

An example of secondary alkyl halide is :