When an electron is added to elements of group $16$ and $17$ in $n = 2$ and $n = 3$ shells,which case experiences less electron-electron repulsion and why?
(B) The $n = 3$ shell experiences less electron-electron repulsion compared to the $n = 2$ shell.
This is because,in the $n = 3$ shell,the incoming electron occupies a larger volume of space,which reduces the effective electron-electron repulsion.
This is because,in the $n = 3$ shell,the incoming electron occupies a larger volume of space,which reduces the effective electron-electron repulsion.
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