About How Many Times Larger in Diameter Is A ${ }_{29}^{64} \mathrm{Cu}$

Multiple Choice

About how many times larger in diameter is a ${ }_{29}^{64} \mathrm{Cu}$ nucleus than an ${ }_{13}^{27} \mathrm{Al}$ nucleus?

A) 2.37
B) 1.54
C) 1.33
D) They are about the same size.
E) Some other factor (specify)