How many molecules are there in the unit cell of sodium chioride?A. `2

1.	How many molecules are there in the unit cell of sodium chioride?A. `2`B. `4`C. `6`D. `8`
Answer» Correct Answer - b In `NaCI` (rock salty) Number of `Na^(+)` ions `= 12` (at edge centers ) `xx (1)/(4) xx 1` (at body centers ) `xx 1 = 4 ` Number of `CI^(-)` ions `= 8` (at centers )`xx (1)/(8) xx 6` (at face centers ) `xx (1)/(4)` Thus `4` formula units per unit cell

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How many molecules are there in the unit cell of sodium chioride?A. `2`B. `4`C. `6`D. `8`

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