Q 1).
can anyone tell me why there are two electrons in inner most shell ('K' shell) from nucleus (I know the formula 2n^2 , but why only 2 electrons,why not 4 or 5 or many) ?
can anyone tell me why there are two electrons in inner most shell ('K' shell) from nucleus (I know the formula 2n^2 , but why only 2 electrons,why not 4 or 5 or many) ?