The mass of an electron is:
9.10938188 × 10-31 kilograms
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.
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.
The rest mass of an electron is its intrinsic mass at rest, which is approximately 9.11 x 10^-31 kg. The effective mass of an electron is a concept in solid-state physics that describes how an electron behaves in a crystalline solid as if it were a free particle with a different mass due to interactions with the crystal lattice. The effective mass can be different from the rest mass and varies depending on the material and the electron's energy level.
The wavelength of an electron is inversely proportional to its speed and directly proportional to its mass. This means that as the speed of an electron increases, its wavelength decreases, and as the mass of an electron increases, its wavelength also increases.
1/1840 the mass if a hydrogen atom.
The effective mass of an electron in a solid is determined by its curvature of the energy band. At the top of the valence band, where the curvature is negative, the effective mass of the electron is also negative, reflecting the opposite relationship between the momentum and velocity of the electron in this region. This negative effective mass indicates that the electron behaves as if it has a negative charge moving in the opposite direction.
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.
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.
A photon is a particle with negligible mass, whose energy and momentum are determined by its frequency and wavelength. It is a fundamental particle that carries electromagnetic radiation.
J.J. Thomson determined the charge-to-mass ratio of the electron (e/m) using a cathode ray tube experiment. He measured the deflection of cathode rays (which are streams of electrons) in electric and magnetic fields. By analyzing the curvature of the electron's path and applying the equations of motion, he could calculate the ratio of the charge of the electron to its mass. This groundbreaking work led to the identification of the electron as a fundamental particle.
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.
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.
The electron has no atomic mass number. The mass of an electron is roughly 1/1800 of the mass of a proton or neutron.
among these Electron has the least mass....
Mass and volume are not determined by density. Rather density is determined by mass and volume
The number of electrons are variable for an element because electrons can be lost or gained. Additionally, the mass of an electron is so much smaller than the mass of neutrons and protons that it can be considered negligible for most purposes.
Electron has a mass of about 9.10938215 × 10−31 kg.