How many effiective `Na^(+)` and `Cl^(-)` ions are present respectively in a uint cell of NaCl solid (Rock salt structure ) if all ions along line connecting opposite face centres are absent ?A. 3,3B. `(7)/(2),4`C. `(7)/(2),(7)/(2)`D. `4,(7)/(2)`

How many effiective `Na^(+)` and `Cl^(-)` ions are present respectivel

1.	How many effiective `Na^(+)` and `Cl^(-)` ions are present respectively in a uint cell of NaCl solid (Rock salt structure ) if all ions along line connecting opposite face centres are absent ?A. 3,3B. `(7)/(2),4`C. `(7)/(2),(7)/(2)`D. `4,(7)/(2)`
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How many effiective `Na^(+)` and `Cl^(-)` ions are present respectively in a uint cell of NaCl solid (Rock salt structure ) if all ions along line connecting opposite face centres are absent ?A. 3,3B. `(7)/(2),4`C. `(7)/(2),(7)/(2)`D. `4,(7)/(2)`

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