which is not the correct statement for ionic solids in which positive and negtive lons are held by strong electrostatic attractive forces ?

which is not the correct statement for ionic solids in which positive

1.	which is not the correct statement for ionic solids in which positive and negtive lons are held by strong electrostatic attractive forces ?
Answer» the RADIUS ratio `r_(+)//r_(-)`increases as COORDINATION number increases As the differnce in size of ions increases, coordination number increases. when coordiantion number is eight`r_(+)//r_(-)`ratio lies between 0.225 to 0.414. In ionic solid of the typeAX ( ZNS, Wurtzite), The coordination number of ` Zn^(+)and S^(2-)` respectively are 4 and 4. Answer :A