d you can see all of them are isoelectronic and for isoelectric elements which ion has more positive charge will have lesser size. And Twhich ion has more negative charge that ion's size will be more.
So, the correct order is \(O^{2}>F^{-}>N a^{+}>m g^{2+}>A^{3+}\)
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$Na , Mg$ અને $Si$ ની પ્રથમ આયનીકરણ એન્થાલ્પી અનુક્રમે $496, 737$ અને $786 \,kJ / mol$ છે. તો $Al$ ની પ્રથમ આયનીકરણ એન્થાલ્પી ( $\left.kJ\, mol ^{-1}\right)$ માં શોઘો.