Number of atoms in face _certred (fcc) crysta

1.	Number of atoms in face _certred (fcc) crysta
Answer» Answer: 4 atoms EXPLANATION: In a FCC lattice there are 8 atoms at eight CORNERS and 6 at face centers, Now each corner contributes to eight cells so per unit cell CONTRIBUTION is 1/8 times 8=1 1/8 ×8=1 atom. Now similarly each face center contributes to two unit cells so contribution per unit cell by six face centers is equal to 1/2 times6=3 1/2 ×6=3 atoms. Hence total no. of atoms per unit cell of FCC lattice is (1+3) =4 atoms.

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Answer:

4 atoms

In a FCC lattice there are 8 atoms at eight CORNERS and 6 at face centers,

Now each corner contributes to eight cells so per unit cell CONTRIBUTION is 1/8 times 8=1

1/8 ×8=1 atom.

Now similarly each face center contributes to two unit cells so contribution per unit cell by six face centers is equal to 1/2 times6=3

1/2 ×6=3 atoms.

Hence total no. of atoms per unit cell of FCC lattice is (1+3) =4 atoms.

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