b The elements \(Na , Al , Si\), and \(P\) are present in same period (\(2^{nd}\) period). Atomic radius increases from left to right in a period. So, the order of atomic radius for the given elements will be \(Na \,>\, Al\, >\, Si \,> \,P\).
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સામાન્ય ઇલેક્ટ્રોનીય બંધારણ $\left( {n - 2} \right){f^{1 - 14}}\left( {n - 1} \right){d^{0 - 1}}\,n{s^2}$ માં જો $n = 7$ હોય તો તે બંધારણ ........ હશે.