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Calculate the number of atoms in a face ...

Calculate the number of atoms in a face centred cubic unit cell.

A

1

B

2

C

4

D

6

Text Solution

Verified by Experts

The correct Answer is:
C
Face centred cubic is also called cubic close packed arrangement it has points at all the corners as well as at the centre of each of the six faces.
The number of atoms present at corners
per unit cell `=8xx(1)/(8)=1.`
The number of atoms presents at faces
per unit cell `=6xx(1)/(2)=3`
`therefore` Total number of atoms in ccp or
fcc arrangement = `1+3=4`
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