Which of the following correctly represents t | vedclass

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

Question

(A) The atomic number of Magnesium $(Mg)$ is $12$.According to the Bohr-Bury scheme,the maximum number of electrons that can be accommodated in a shel

Vedclass · Accepted Answer

$2, 8, 2$

Vedclass · Answer

(A) The atomic number of Magnesium $(Mg)$ is $12$.According to the Bohr-Bury scheme,the maximum number of electrons that can be accommodated in a shell is given by the formula $2n^2$,where $n$ is the orbit number.The first shell ($K$-shell,$n=1$) can hold a maximum of $2(1)^2 = 2$ electrons.The second shell ($L$-shell,$n=2$) can hold a maximum of $2(2)^2 = 8$ electrons.The remaining electrons go into the third shell ($M$-shell,$n=3$).For $Mg$ $(Z=12)$,the distribution is $2$ in the $K$-shell,$8$ in the $L$-shell,and $2$ in the $M$-shell.Thus,the electronic configuration is $2, 8, 2$.

Which of the following correctly represents the electronic distribution in the $Mg$ atom?

Similar Questions

The number of electrons in the outermost '$L$' shell of an atom is $5$.
$(a)$ Write its electronic configuration.
$(b)$ What is its valency and why?

Name any two noble gases.

An atom of an element has full $K$ and $L$ shells and has $5$ electrons in its $M$ shell. What is its atomic number?

$(a)$ Explain the Bohr$-$Bury rules for the distribution of electrons into different shells.
$(b)$ Draw the electronic structure of element $X$ with atomic number $17$ and element $Y$ with atomic number $16$.

Why do Helium,Neon and Argon have a zero valency?

Vedclass Test Series

Exam Paper Generator

Online Exam Module