In the basic CsCI crystal structure,`Cs^(+)` and`CI^(-)` ions are arrnged in a bcc configuration as shown in the figure.The net electrostatic force exerted by the eights `Cs^(+)` ion9s on the `Cl^(-)` ions is

Options

A. `-(1)/(4pivarepsilon_(0))-(4e^(2))/(3a^(2))`
B. `-(1)/(4pivarepsilon_(0))-(16e^(2))/(3a^(2))`
C. `-(1)/(4pivarepsilon_(0))-(32e^(2))/(3a^(2))`
D. Zero

Answer

D

Explanation

The electrostatic force due to one `Cs^(+)` iion is balanced by diagonally oppsite other`Cs^(+)`.Thus the net electrostatic force on Cl ion due to eight `Cs^(+)` ions is zero.