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The nucleus of a Helium atom contains two protons and two neutrons, protons and neutrons are measured in Daltons, and a Helium atom is about 4 Daltons

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βˆ™ 14y ago
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βˆ™ 14y ago

Helium particles are lighter than air, actually.But hydrogen is lighter than helium particles.

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βˆ™ 12y ago

The covalent radius of the helium atom is 28 pm.

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βˆ™ 15y ago

within a given probability, 31pm

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Q: What is the diameter of the helium atom?
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