*Recall:***Density** is given by:

We know the mass of a neon atom, **3.35 × 10 ^{–}^{23} g**. For the volume, we need to calculate the volume of the atom. The volume of a sphere is given by:

where **r = radius**.

The radius of a neon atom is 69 pm, and its mass is 3.35 x 10^{-}^{23} g. What is the density of the atom in grams per cubic

centimeter (g/cm^{3})? Assume the nucleus is a sphere with volume = ^{4}/_{3}*πr ^{3}*.

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