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The nucleus of an atom can be assumed to be spherical. The radius of the nucleus of mass number 7 is given by 1.25x 10-13 A 1/3 cm Radius of atom is one A. If the mass number is 64, then the fraction of the atomic volume that is occupied by the nucleus is:
(1)1.0x 10-3
(2) 5.0x 10-5
(3) 2.5x 10-2
(4) 1.25x 10-13
Ans: 1.25x 10-13
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