The mass of an atom is concentrated primarily in its nucleus.If the mass of a uranium atom's nucleus is about 4 * 10^-21 g and its radius is about 8 fm, what is the approximate density of the nucleus? The volume of a sphere is 4 $\pi$r³/3.

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Quizplus · Accepted Answer

The density is calculated using the formula density = mass/volume. The volume of the nucleus is calculated using the formula for the volume of a sphere, V = 4/3 * π * r^3. With r = 8 fm = 8 x 10^-13 cm, the volume is approximately 2.14 x 10^-37 cm^3. The density is then (4 x 10^-21 g) / (2.14 x 10^-37 cm^3) ≈ 1.87 x 10^15 g/cm^3, which is closest to 2 x 10^15 g/cm^3.

The Mass of an Atom Is Concentrated Primarily in Its π\piπ

The Mass of an Atom Is Concentrated Primarily in Its $\pi$