Which of the following is not correct?

Options

A. Ionic radius does not after the physical and chemical properties of an ionic compound.
B. For ions derived from elements in different groups, the comparison in size is meaningfual only if the ions are isolectronic.
C. Among isolectronic cations, the size decreases as the charge on cation increases.
D. Among isolectronic anious, the size increases as the charge on anion increases.

Answer

A

Explanation

The three-dimensional structure and hence, the properties of an ionic compounds depend on the relative sizes of its cations and anions. Isoelectronic cations are smaller than anions: `r_(Na+)lt r_(F^(-)),r_(A1^(3+))lt r_(Mg^(2+)) lt_(Na^(+)), r_(O^(2)) gt r_(F^(-))`