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#### A metal crystallizes with a face-centered cubic lattice. The edge of the unit cell is 408 pm. The diameter of the metal atom is: Option 1) 288 pm Option 2) 408 pm Option 3) 144 pm Option 4) 204 pm

As we learnt in

No. of atoms(z) for face centered unit cell -

Lattice points: at corners and face centers of unit cell.

For face centered cubic (FCC), z=4.

- wherein

For an FCC lattices

Correct option is 1.

Option 1)

288 pm

Correct

Option 2)

408 pm

Incorrect

Option 3)

144 pm

Incorrect

Option 4)

204 pm

Incorrect