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The mass of an electron is:
0.000548579867 Atomic Mass units (amu)
or,
9.10938188 × 10-31 kilograms
or,
9.10938188 × 10-28 grams
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoBecause the electron is so light compared to protons and neutrons, its mass is generally regarded as zero. The reason the atomic weights of elements are decimal numbers is not the result of the electrons' mass, but rather the different isotopes of the elements. Even if the mass of the electron were to be considered, it would not be significant in atomic weights unless the atomic weight was written to many significant figures.
Wiki User
∙ 12y agoInsignificant.
the masses of electrons are regarded as zero because they're so small!
Wiki User
∙ 7y agoWiki User
∙ 12y ago9.1084E-31 kg
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Who discovered the charge to mass ratio for the electrons?
Millikan found the charge of an electron by his famous oil drop experiment. J J Thomson determined the specific charge of the electron. That means the ratio of the charge of an electron to its mass. With these two values one can find the mass of electron by dividing the charge value by its specific charge.
What has the least mass - electron neutron proton nucleus?
LEAST mass? That would be photos or neutrinos, which have no mass at all. Where Least is greater than zero? Electrons, probably; an electron is 1/1836th of a proton, I seem to recall. Neutrinos actually have a small nonzero mass, so small it has yet to be determined. No neutrino has a mass of more than a few eV, the electron has a mass of about 0.5MeV.
The rest mass energy of an electron positron pair is?
Twice the mass of the electron, since the positron has the same mass of the electron. Or the equivalent, in energy units.An electron has a mass or energy of 511 keV.
Relative mass of electron?
1/1840 the mass if a hydrogen atom.
What is the difference between rest mass and effective mass of electron?
mass
Who discovered the charge to mass ratio for the electrons?
Millikan found the charge of an electron by his famous oil drop experiment. J J Thomson determined the specific charge of the electron. That means the ratio of the charge of an electron to its mass. With these two values one can find the mass of electron by dividing the charge value by its specific charge.
What has the least mass - electron neutron proton nucleus?
LEAST mass? That would be photos or neutrinos, which have no mass at all. Where Least is greater than zero? Electrons, probably; an electron is 1/1836th of a proton, I seem to recall. Neutrinos actually have a small nonzero mass, so small it has yet to be determined. No neutrino has a mass of more than a few eV, the electron has a mass of about 0.5MeV.
What did Robert milikan discover?
Millikan's oil-drop experiment demonstrated that charge is quantized, and that the quantum of charge ... the 'elementary' charge ... is 1.6 x 10-19 Coulomb.
What does the atomic mass of an electron represent?
The mass of an electron is atomic mass units is 5,485 799 090 70(16); the mass of the electron is not an atomic mass.
What is an electron's atomic mass number?
The electron has no atomic mass number. The mass of an electron is roughly 1/1800 of the mass of a proton or neutron.
Does the atomic number of an element change with the gain or loss of an electron?
The electrical charge is changed by -1 when an atom loses an electron. The atomic mass number is determined by the number of protons and neutrons in the nucleus and is unaffected by the loss of an electron.
Who has the smallest mass electrons protons or neutrons?
Of the neutron, proton, and electron, the electron has the smallest mass.
How is mass and volume determined in density?
Mass and volume are not determined by density. Rather density is determined by mass and volume
The rest mass energy of an electron positron pair is?
Twice the mass of the electron, since the positron has the same mass of the electron. Or the equivalent, in energy units.An electron has a mass or energy of 511 keV.
Who determined the charge to mass ratio to the positive rays?
J.J.Thompson determined the electron charge to mass ratio. His results, however, were off by almost a factor of two, although they were consistent, leading us to believe there was some systematic error in his measurements.
What is the mass of of an electron?
Electron has a mass of about 9.10938215 × 10−31 kg.
How does the mass of an electron compared to the mass of proton?
The proton mass is about 2,000 times greater than the electron mass.
