NEET Physics Nuclei Questions Solved


Order of magnitude of density of uranium nucleus is (mP=1.67×10-27 kg)
(a) 1020 kg/m3           (b) 1017 kg/m3
(c) 1014 kg/m3           (d) 1011 kg/m3

(b) The order of magnitude of mass and volume of uranium nucleus will be
m ≃ A(1.67×10-27  kg) (A is atomic number)
V=43πr343π1.25×10-15m A1/338.2×10-45 m3A

Hence, ρ=mV=A1.67×10-27 kg8.2×10-45 m3A

2.0×1017 kg/m3
.

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