Calculate the volume of a unit cell having an atomic radius of $141.4 \ pm$ forming an $fcc$ unit cell.
- A$9.3 \times 10^{-23} \ cm^3$
- B$8.1 \times 10^{-23} \ cm^3$
- C$6.4 \times 10^{-23} \ cm^3$
- D$4.7 \times 10^{-23} \ cm^3$
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In a body-centered cubic $(BCC)$ unit cell,how many metal atoms surround the metal atom located at the center of the cell?
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