Arrange the following in increasing order of the property indicated. (i) F, Cl, Br and I (negative electron gain enthalpy) (ii) Mg^(2+), O^(2-), Na^(+), F^(-) and N^(3-)" (ionic size)" (iii) Mg, Al, Si and Na (ionization enthalpy) (iv) Br^(+) Br and Br^(-) (size)

Arrange the following in increasing order of the property indicated.

1.	Arrange the following in increasing order of the property indicated. (i) F, Cl, Br and I (negative electron gain enthalpy) (ii) Mg^(2+), O^(2-), Na^(+), F^(-) and N^(3-)" (ionic size)" (iii) Mg, Al, Si and Na (ionization enthalpy) (iv) Br^(+) Br and Br^(-) (size)
Answer» Solution :(i) `I lt Br lt F lt CL` II `Mg^(2+) lt Na^(+) lt F^(-) lt O^(2-) lt N^(2-)` (iii) `Na lt Al lt Mg lt Si` iv `Br^(+) lt Br lt Br^(-)`