# chemistry

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Please help. My teacher never went over crystal lattices and the book doesn't cover it either :(

Copper crystallizes in a face-centered cubic lattice. If the edge of the unit cell is 351pm, what is the radius of the copper atom?

• chemistry -

4r = a*21/2
a is the edge length, r is radius.

• chemistry -

r= a/2âœ…2(2 root 2)where be the edge length

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