Electronic configuration of magnesium is : - Vidyadip

MCQ

Electronic configuration of magnesium is :

✓
$2, 8, 2$
B
$2, 8, 1$
C
$2, 8, 7$
D
$2, 1$

✓

Answer

Correct option: A.

$2, 8, 2$

Magnesium has atomic number $12$. It will be distributed in $\ce{K, L, M}$ shell in the following way:
$K$ shell can accommodate a maximum of $2$ electrons.
$L$ shell can accommodate a maximum of $8$ electrons and $M$ shell will accommodate $2$ electrons.
So the configuration becomes $2, 8, 2.$

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 Classification of Elements and Periodicity in Properties→Classification of Elements and Periodicity in Properties — all question types→Chemistry STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

For a reaction, $\Delta H = -40\,kJ$ and $\Delta S = -50\,J/K$ . At what temperature range will it change from spontaneous to non-spontaneous ?

Phosphorus pentachloride dissociates as follows, in a closed reaction vessel

$PCl_5(g) \rightleftharpoons PCl_3(g) + Cl_2(g)$

If total pressure at equilibrium of the reaction mixture is $P$ and degree of dissociation of $PCl_5$ is $x,$ the partial pressure of $PCl_3$ will be

What is the product when acetylene reacts with hypochlorous acid

Which one of the following cannot function as an oxidising agent ?

Why do the deviations occur from idealized shape of $\ce{H_2O}$ and $\ce{NH_3}$ molecules?

$CH \equiv CH\mathop {\xrightarrow{{HgS{O_4}}}}\limits_{{H_2}S{O_4}} \mathop {\xrightarrow{{C{H_3}MgBr}}}\limits_{{H_2}O} \xrightarrow{{P/B{r_2}}}$

Which of the following compounds will form a hydrocarbon on reaction with Grignard reagent

Which of the following is polar?

$B.P.$ of branched chain alkanes as compared to straight chain alkanes are

Oxidation number of sulphur in ${S_2}O_3^{2 - }$is