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1. The isotope 64Zn has a nuclear radius of 4.8 x 1015 m. Approximately what is the nuclear radius of the isotope 27Al?

a. 2.0 x 1015 m
b. 2.7 x 1015 m
c. 3.6 x 1015 m
d. 4.0 x 1015 m

2. The isotope 64Zn has a nuclear radius of 4.8 x 1015 m. Which of the following is the mass number of an isotope for which the nuclear radius is 7.2 x1015 m?

a. 144
b. 96
c. 125
d. 216

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