Q: Calculate the speed of a 500 keV electron?

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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.

Beta particles are actually electrons (-e) or can be positrons.The mass of one electron or beta particle is 9.1095*10-31 kilograms or 0.000548597 AMU which is about 1/2000 times the mass of a proton or neutron.

20 Kev

A beta particle is an electron, this has a mass much less than a proton or neutron and so was can use zero in most situations. However in some calculations for mass defect of whole atoms and Q-value calculations in nuclear decays it can become important, in these calculations. An electron has a mass of 511 keV/(c^2), and an AMU is 931 MeV/(c^2). So, dividing the electron mass by the AMU mass, we get the mass of the beta in AMU: 511/931000 = 0.00055 AMU.

A gamma ray will have energy in excess of 100 keV (kiloelectronvolts).

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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.

Hi, I am not entirely sure what your Question is, but I'll take a shot at it... I think you are asking what keV stands for right??? If so, keV stands for kilo electon volt ie 1000 electron volts where; 1 electron volt is approx. equal to 1.602*10^(-19) Joules. Hope this helped :) jdru4706

There is no relationship between eV and V. An electron/volt is the energy acquired by an electron as it moves through an electric field of one volt. So 110 KeV is the energy acquired by an electron as it moves through an electric field of 110,000 volts.

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A tiny unit of energy, used for subatomic particles, is the electron-volt (eV). Multiples, like keV, MeV, and TeV, are also used. Because the mass-energy equivalence is quite clear in the subatomic world, the mass of particles is also often expressed in electron-volts.A tiny unit of energy, used for subatomic particles, is the electron-volt (eV). Multiples, like keV, MeV, and TeV, are also used. Because the mass-energy equivalence is quite clear in the subatomic world, the mass of particles is also often expressed in electron-volts.A tiny unit of energy, used for subatomic particles, is the electron-volt (eV). Multiples, like keV, MeV, and TeV, are also used. Because the mass-energy equivalence is quite clear in the subatomic world, the mass of particles is also often expressed in electron-volts.A tiny unit of energy, used for subatomic particles, is the electron-volt (eV). Multiples, like keV, MeV, and TeV, are also used. Because the mass-energy equivalence is quite clear in the subatomic world, the mass of particles is also often expressed in electron-volts.