The mass of an electron is almost entirely negligible compared to the mass of an atom. I'm not sure if that's the question you were asking, but you can essentially ignore electron mass when calculating the mass of an atom; an electron's mass is only about 0.0005 amu, so even for the heaviest elements the total mass of the electrons is still a tiny fraction of an amu.
an electron is about 1/1836 amu.
The mass of an electron is approximately 9.11 x 10^-31 kilograms. In comparison, a hydrogen atom, which consists of one proton and one electron, has a mass of about 1.67 x 10^-27 kilograms. This means that the mass of the electron is roughly 1/1836 of the mass of the hydrogen atom, making the electron's mass negligible in comparison to the proton's mass within the hydrogen atom.
The Electron.
The atom loses mass when a beta particle is released because a neutron decays into a proton, electron, and antineutrino. The mass of the neutron is greater than the combined mass of the resulting proton, electron, and antineutrino.
The mass of an electron is almost entirely negligible compared to the mass of an atom. I'm not sure if that's the question you were asking, but you can essentially ignore electron mass when calculating the mass of an atom; an electron's mass is only about 0.0005 amu, so even for the heaviest elements the total mass of the electrons is still a tiny fraction of an amu.
This is because the mass of electron is without importance compared to the mass of protons and neutrons.
Which particle? The electron.
an electron is about 1/1836 amu.
Mass of electron is not included for the calculation of mass of an atom.
The Electron.
The electron.
The three particles that make up an atom are protons, neutrons and electrons. Protons and neutrons both have a mass of 1 unit, whereas the mass of an electron is 1/1837 of that of a proton or a neutron. Therefore, the electron has the least mass as its mass is considered negligible.
An electron has a much smaller mass than any atom.
The difference in mass between a sodium atom and a sodium ion (supposing Na+) is 9.10938188 × 10-31kg (the mass of an electron). This is due to the sodium atom losing an electron to form an ion. In order to attain the mass of a single sodium atom you need to divide the molar massn (mass number) of sodium by avogadro's number. You can then find the mass of the ion by subtracting the mass of an electron from the mass of a sodium atom.
The atom loses mass when a beta particle is released because a neutron decays into a proton, electron, and antineutrino. The mass of the neutron is greater than the combined mass of the resulting proton, electron, and antineutrino.
The electron is the lightest particle in the atom.