Convert Atomic mass unit [u] to Electron mass (rest) Online | Free weight-and-mass Converter

Atomic Mass Unit [u]

The atomic mass unit (u), also known as the unified atomic mass unit or dalton (Da), is a standard unit of mass used to express atomic and molecular weights.

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  1 u = 1/12 the mass of a carbon-12 atom

  
  
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  1 u ≈ 1.66053906660 × 10⁻²⁷ kilograms

  
  
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  Symbol: u or Da

  
  

Key Facts:

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  Used to measure the mass of atoms, molecules, and subatomic particles

  
  
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  1 hydrogen atom ≈ 1 u

  
  
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  Mass of a proton ≈ 1.007 u, neutron ≈ 1.008 u

  
  
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  Simplifies comparison of atomic-scale masses in chemistry and physics

  
  

The atomic mass unit provides a convenient and consistent way to express and compare very small masses at the atomic and molecular scale.

Electron Mass (Rest)

The rest mass of an electron is the intrinsic mass of an electron when it is at rest (not moving relative to an observer).

Its value is approximately 9.109 × 10⁻³¹ kilograms (or about 0.511 MeV/c² in energy units).

This tiny mass is fundamental to atomic and particle physics, influencing how electrons behave in atoms and electric currents.

Summary:

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  Rest mass ≈ 9.109 × 10⁻³¹ kg

  
  
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  Equivalent to about 0.511 MeV/c²

  
  
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  Fundamental property of the electron in physics