The electron distribution in an aluminium ato | vedclass

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(C) 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

Vedclass · Accepted Answer

$2, 8, 3$

Vedclass · Answer

(C) 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 orbit number.For the first shell $(n=1)$,the capacity is $2(1)^2 = 2$ electrons.For the second shell $(n=2)$,the capacity is $2(2)^2 = 8$ electrons.For the third shell $(n=3)$,the remaining electrons are placed. Since $13 - 2 - 8 = 3$,the third shell contains $3$ electrons.Thus,the electron distribution is $2, 8, 3$. Therefore,option $(C)$ is correct.

The electron distribution in an aluminium atom is

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