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Grade 12Physical Chemistry

the edge length of FCC is 508 pm if the radius if the cation is 110 pm the radius of anion is ans is 114 pm

Profile image of Shivam
12 Years agoGrade 12
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3 Answers

Profile image of siddharth gupta
12 Years ago
the same question was asked in aieee 2010.The language of question is not very clear as FCC can be rock salt,zinc blende,fluorite or anti-fluorite , but we simply consider it to be rock salt 
and hence rc+ra=a/2i.e110+ra=254i.e ra=144 pm.
thank you
siddharth gupta
Profile image of Sai lokheshh
8 Years ago
Rc+Ra=1/2,which implies that answer will 249 pico metre it can also be find by drawing the cube and filled by a pythagorous theorem which implies answer as 249 pico metre
Profile image of Rishi Sharma
6 Years ago
Dear Student,
Please find below the solution to your problem.

FCC can be rock salt,zinc blende,fluorite or anti-fluorite , but we simply consider it to be rock salt
and hence rc+ra=a/2i.e110+ra=254i.e ra=144 pm.

Thanks and Regards

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