How much does a helium atom weigh?
6.65 × 10⁻²⁷ kgWhich one: 6.65 × 10⁻²⁷ kg
A helium atom has a mass of about 6.65 × 10⁻²⁷ kg.
Atomic masses converted to kilograms, for the very smallest puzzles.
How heavy is that?
- A helium atom weighs about as much as 7,300 electrons.
About the same weight
More atoms
- Electron 9.11 × 10⁻³¹ kg
- Proton 1.67 × 10⁻²⁷ kg
- Hydrogen atom 1.67 × 10⁻²⁷ kg
- Carbon atom 1.99 × 10⁻²⁶ kg
- Oxygen atom 2.66 × 10⁻²⁶ kg
- Water molecule 2.99 × 10⁻²⁶ kg
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