The electron distribution in an aluminium ato | vedclass

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(B) The atomic number of aluminium $(Al)$ is $13$.According to the Bohr-Bury scheme,the maximum number of electrons that can be accommodated in a shel

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$2, 8, 3$

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(B) The atomic number of aluminium $(Al)$ is $13$.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 shell number.For the $K$ shell $(n=1)$,the capacity is $2(1)^2 = 2$ electrons.For the $L$ shell $(n=2)$,the capacity is $2(2)^2 = 8$ electrons.The remaining electrons go to the $M$ shell $(n=3)$.For $13$ electrons,the distribution is $2$ in the $K$ shell,$8$ in the $L$ shell,and $3$ in the $M$ shell.Therefore,the electron distribution is $2, 8, 3$.

The electron distribution in an aluminium atom is

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