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23 Nov 2019
Helium is the lightest noble gas and the second most abundantelement (after hydrogen) in the universe.
a. The radius of a helium atom is 3.1 x 10^-11 m; the radius ofits nucleus is 2.5 x10^-15 m. What fraction of the spherical atomicvolume is occupied by the nucleus?
b. The mass of a helium-4 atom is 6.64648 x 10^-28 g. Whatfraction of this atom's mass is contributed by itsnucleus?
Helium is the lightest noble gas and the second most abundantelement (after hydrogen) in the universe.
a. The radius of a helium atom is 3.1 x 10^-11 m; the radius ofits nucleus is 2.5 x10^-15 m. What fraction of the spherical atomicvolume is occupied by the nucleus?
b. The mass of a helium-4 atom is 6.64648 x 10^-28 g. Whatfraction of this atom's mass is contributed by itsnucleus?
Elin HesselLv2
3 Aug 2019
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