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The number of atoms present in a fcc uni...

The number of atoms present in a fcc unit cell is

A

6

B

8

C

4

D

12

Text Solution

Verified by Experts

Number ofatoms in a f.c.c. unit cell is
`=8xx1/2+6xx1/2`
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packing fraction of a unit cell is drfined as the fraction of the total volume of the unit cell occupied by the atom(s). P.E=("Volume of the atoms(s) present in a unit cell")/("Volume of unit cell")=(Zxx(4)/(3)pir^(3))/(a^(3)) and % of empty space = 100- P.F.xx100 where Z= effective number of atoms in s cube . r= radius of a an atoms a = edge length of the cube % of empty space in body centered cubic cell unit is nearly :

packing fraction of a unit cell is drfined as the fraction of the total volume of the unit cell occupied by the atom(s). P.E=("Volume of the atoms(s) present in a unit cell")/("Volume of unit cell")=(Zxx(4)/(3)pir^(3))/(a^(3)) and % of empty space = 100- P.F.xx100 where Z= effective number of stoms in s cube . r= radius of a an atoms a = edge lenght of the cube Packing fraction in face centered cubic unit cell is :

In a diamond, each carbon atom is bonded to four other carbon atoms tetrahedrally. Alternate tetrahedral voids are occupied by carbon atoms. The number of carbon atoms per unit cell is:

OMEGA PUBLICATION-THE SOLID STATE-MULTIPLE CHOICE QUESTIONS
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  7. Volume occupied in f. c. c. is :

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  8. The conductivity of metals increases with:

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  9. What is radius ratio for the co-ordination number 8

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