Mass of Electron, proton, neutron|Charge of electron and Proton

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Mass of electron: The electron mass (me) is the mass of a stationary electron, also known as the rest mass of the electron. The value of mass of an electron is, 9.109 383 7015 x 10-31 kg, 0.00054858 amu.

Mass of Electron

The electron mass determines a number of observed effects in atomic physics, so its very imporatant to find out the most accurate value of electron mass.

The mass of the electron was determined directly from combining two measurements.

  1. The mass-to-charge ratio of the electron
  2. The charge of the electron

The mass-to-charge ratio of the electron was first estimated by Arthur Schuster in 1890 .

in 1897, J. J. Thomson showed that cathode rays consist of streams of particles later called electrons, and made more precise measurements of their mass-to-charge ratio using a cathode ray tube.

The charge of the electron was determined by Robert A. Millikan in his oil drop experiment in 1909.

Mass of Electron,Proton and neutron is given. Another detailed post : Electron Mass – Mass of electron, Charge, Speed, & value of electron can be read here

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mass of electron in gm,kg, amu, & eV
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Electron Mass and uncertainty

electron massme
Numerical value9.109 383 7015 x 10-31 kg
Standard uncertainty0.000 000 0028 x 10-31 kg
Relative standard uncertainty3.0 x 10-10
Concise form9.109 383 7015(28) x 10-31 kg

Mass of Proton

Proton mass mp = 1.672621898×10−27 Kg. Mass of proton is higher than the mass of electron.

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Proton massValue
Mass of the proton in kg1.672621898(21)×10−27 kg
Mass of the proton in grams1.672621898(21)×10−24 g
Mass of proton in amu1.007276466879(91) u
Proton mass in MeV938.2720813(58) MeV/c2

Mass of Neutron

Mass of Neutron is , mN 1.674927471 x 10-27kg.

Neutron massValue
Mass of neutron in kg1.674927471(21)×10−27 kg
Mass of neutron in grams1.674927471(21)×10−24 kg
Mass of neutron in amu1.00866491588(49) amu
Mass of neutron in MeV939.5654133(58) MeV/c2
Mass of Neutron

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Comparison of Mass of Electron, Proton and Neutron

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Mass of Electron

Basic Physical Concepts of Atom, Nucleus, Proton, electron

Electron-Mass of electron, Charge of electron, Speed of Electron, value of electron

Electron Drift Velocity

Basic Physical Concepts of Atom, Nucleus, Proton, electron is detailed in this post in EEE Notebook Read it HERE

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Important FAQ’s

what is the mass of an electron?

The rest mass of the electron is 9.1093837015 × 10−31 kg

What is mass of electron and proton?

mass of the electron is 9.1093837015 × 10−31 kg and proton is

How much is mass of electron in kg?

The rest mass of the electron is 9.1093837015 × 10−31 kg

What is mass of electron in amu?

Electron mass in amu (Atomic Mass Unit) is 0.00054858 amu

What is mass of electron in grams?

 9.108 × 10−28 g 

What is electron rest mass?

The rest mass of the electron is 9.1093837015 × 10−31 kg

What is the value of the charge of an electron?

1.60217662 × 10-19

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