A) \[\operatorname{mass}\,\,of\,\,8C{{a}^{++}}\,ions\,\,and\,\,4{{F}^{-}}\,ions\]
B) \[\operatorname{mass}\,\,of\,\,4C{{a}^{++}}\,ions\,\,and\,\,8{{F}^{-}}\,ions\]
C) \[\operatorname{mass}\,\,of\,\,4C{{a}^{++}}\,ions\,\,and\,\,4{{F}^{-}}\,ions\]
D) \[\operatorname{mass}\,\,of\,\,1C{{a}^{++}}\,ions\,\,and\,\,2{{F}^{-}}\,ions\]
Correct Answer: B
Solution :
In \[Ca{{F}_{2}}\] (calcium fluorite) structure, 1-unit cell contains \[4\,C{{a}^{2+}}\] ions and 8F ions. So, mass of unit cell of \[Ca{{F}_{2}}=\] mass of \[4\,C{{a}^{2+}}\] ions + mass of 8F ions.You need to login to perform this action.
You will be redirected in
3 sec