An alpha particle, boom.
The particles emitted during radioactive decay include alpha particles (mass of 4 amu, charge of +2e), beta particles (mass of nearly zero amu, charge of -1e), and gamma rays (no mass or charge).
protons --- rel. mass 1 amu, rel. charge +1, location in the nucleus. neutrons --- rel. mass 1 amu, rel. charge 0, location in the nucleus. electrons --- rel. mass 0 amu, rel. charge -1, location outside the nucleus.
An alpha particle has a relative mass of 4 amu and a charge of +2.
The mass of an alpha particle is approximately 4 amu (atomic mass units).
In the atom: Neutron: Mass: 1,00866491600(43) amu. Charge: neutral James Chadwick, 1932 Electron: Mass: 5,4857990946(22)×10−4 amu. Charge: negative J. J. Thomson, 1897 Proton: Mass: 1,007276466812(90) amu. Charge: positive Ernest Rutheford, 1919
The subatomic particles of an atom are protons (+1 charge), neutrons (no charge), and electrons (-1 charge). Protons and neutrons are located in the nucleus, while electrons orbit around the nucleus in energy levels.
For the atom: Neutron: Mass: 1,00866491600(43) amu. Charge: neutral Electron: Mass: 5,4857990946(22)×10−4 amu. Charge: negative Proton: Mass: 1,007276466812(90) amu. Charge: positive
These particles are components of atoms and the basic "bricks" of matter. Neutron: Mass: 1,00866491600(43) amu. Charge: neutral Electron: Mass: 5,4857990946(22)×10−4 amu. Charge: negative Proton: Mass: 1,007276466812(90) amu. Charge: positive
Alpha radiation consists of particles with a charge of +2 and a mass of 4 amu, equivalent to a helium nucleus. Beta radiation consists of particles with a charge of either -1 or +1 and negligible mass, corresponding to electrons or positrons.
Proton.
An electron has a negative charge and a mass close to 0 amu (atomic mass unit).
The electron has a charge of -1; but the electron has a mass.