Protons and Neutrons compose the nucleus of an atom. Protons and nutrons weight combine to give the mass of the atom. In most atoms, the amount of Neutrons is equivalent to the amount of Protons.
protons and neutrons are about 1 amu
If you mean subatomic particle as in protons neutrons and electrons, electrons have the lowest mass. If you are talking even smaller, leptons have extremely tiny rest masses.
Proton and neutron (components of the atomic nucleus) have masses very close.
Every subatomic particle has mass, so every particle will cause a slight mass change. However, in an isotope, the mass change between the parent and daughter is caused by a change in the number of neutrons.
The mass of a nucleus is subtracted from the sum of the masses of its individual components.
proton there is no such thing as an electrical charged nut there is such a thing as a charged particle, that is also known as neutron
no electric charge. the nuclear theory at the time explained the atomic masses by assuming the nucleus contained a number of protons equal to the atomic mass number and enough electrons to cancel the charge beyond that of the atomic number of the element.
an alpha particle
Alpha Particle
You may be referring to neutrons, protons and electrons. The neutron is heavier than the proton, but the difference is more like two electrons than one.
Subatomic particles are measured in AMU.1 Proton = 1 AMU (Positive Charge [think pro])1 Neutron = 1 AMU (No Charge [think NEUtral])1 Electron = 1/1836 AMU (Negative Charge)
From Wikipedia, masses as follows: proton = 1.6726 x 10 to the -27 kg neutron = 1.6749 x 10 to the -27 kg. electron = mass of proton/1836.