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C. Then we plug the radius into the area equation to get 93.5 Cm
3. What is volume of one aluminum atom? (show your work)
a. The atomic radius of aluminum is 143 pm
b. The cubic radius of Al is 2924207
C. Volume = 4/3 xr
d. Volume = 1.22 x 10' pm
4. Research face-centered cubic structures on the web. What is the length of one side of the crystal unit
cell for aluminum? (show your work)
a. Face centered cubic structures have atoms located at each of the corners and the centers
of all the cubic faces. Face centered cubic has 4 atoms per unit
b. (26.98 g Al/ 1 mole Al) X (1 mole Al/6.022 x 10") X (4 atoms Al/ 1 face centered cubic
unit) XX (1 cm / 2 702 g Al) the known density for Al = 6.60 x 10." cm'
c. V= length take the cube root of 6.60 x 10"":
d. 4.04 x 10%

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