crystalline cscl has density is 3.988 g cm⁻³. the volume occupied by single cscl ion pair in the crystal will be____
a. 7.014 x 10⁻³ cm³
b. 7.014 x 10⁻²³ cm³
c. 1.014 x 10⁻³ cm³
d. 1.542 x 10⁻⁵ cm³