The approximate size of the nucleus of \( { }_{28}^{64} \mathrm{Ni} \) is: (a) \( 3 \mathrm{fm} ...

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The approximate size of the nucleus of \( { }_{28}^{64} \mathrm{Ni} \) is:
(a) \( 3 \mathrm{fm} \)
(b) \( 4 \mathrm{fm} \)
(c) \( 5 \mathrm{fm} \)
(d) \( 2 \mathrm{fm} \)
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