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CBSE Class 12-science Answered

which unit cell has higher mass
Asked by opbmschool | 27 Jun, 2010, 12:34: PM
answered-by-expert Expert Answer
NaCl
CsCl unit cell las one Cs atom and one Cl atom. Cs is present in the body centre and Cl is prpesent on all eight corners.
Mass of unit cell = 133 + 35.5 = 168.5
 
NaCl unit cell has Cl on all corners and face centres. therefore total number of Cl atoms present = 4. NaCl has Na on all edge cetres and body centre. Tehrefore, it has 4 Na taoms.
So, mass of NaCl unit cell = (4 x 23) + (4 x 35.5) = 234
Answered by | 14 Jul, 2010, 04:28: PM

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