Question 1
Give the coordination number for a body-centred cubic cell.
◦ 4
◦ 12
◦ 10
◦ 6
◦ 8
Question 2
Determine the radius of an Al atom (in pm) if the density of aluminum is 2.71 g cm
-3. Aluminum crystallizes in a face-centred cubic structure with an edge length of 2
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r.
◦ 172 pm
◦ 193 pm
◦ 227 pm
◦ 96 pm
◦ 143 pm