Electron
The atomic mass is the mass of a molecule, atomic particle or sub-atomic particle.
This atomic particle is the neutron.
When calculating atomic mass, the mass of electrons is typically ignored because it is so small compared to the mass of protons and neutrons. Electrons have a much smaller mass relative to protons and neutrons, so they do not significantly contribute to the total atomic mass of an atom.
A neutron is the subatomic particle with a charge of 0 and a mass of 1 atomic mass unit.
This atomic particle is the neutron.
Photons and neutrinos dont have mass.
An alpha particle is a helium-4 nucleus. It has a mass of about 4 atomic mass units.
atomic number = number of protons = number of electrons atomic mass = mass of protons + mass of neutrons
A beta particle, which can be either an electron (β-) or a positron (β+), has a very small atomic mass of approximately 0.00054858 atomic mass units (amu) for an electron. This is significantly less than the atomic masses of protons and neutrons, which are about 1 amu each. In practical terms, the mass of a beta particle is often considered negligible compared to nucleons in atomic nuclei.
atomic mass unit
neutrons, subtract the atomic number from the mass number to find the number of neutrons, atomic number is the number is the amount of protons, atomic mass is the average mass of one mole of atoms. each particle wieghing one amu (atomic mass unit)
Aluminium is a non metal element. Atomic mass of it is 26.982.