A neutron.
An alpha particle has the charge 2+ and the mass 4.
The Neutron
The term nucleon is applied to any particle that makes up an atomic nucleus. That means it can be applied to either a proton or a neutron (but only when we are talking about them as the components of an atomic nucleus). The nucleon with the positive charge is the proton. You'll recall that the neutron is a neutral particle; it has no charge.
From Physics Forums The alpha particle has a 2+ charge, beta has 1- charge, and the gamma is neutral (no charge). The beta particle could also have a 1+ charge if it undergoes positron emission [a proton turns into a neutron and a positron (the "anti-electron")]
No nuclear particle has a relative mass of 4. However, the alpha particle which is emitted by one of the radioactive iodine isotopes, has a relative mass of 4. An alpha particle is emitted from the nucleus but not referred to as a nuclear particle because it is made up of 4 nuclear particles - 2 neutrons and 2 protons.
A particle that has a mass of 1 and a charge of 1 plus is a proton.
No, that would be a neutron. A proton is a nuclear particle with a mass of 1 AMU and a 1+ charge
No, an alpha particle has a mass of 4 amu and a charge of +2. It is a helium nucleus. The neutron has a mass of 1 amu and no charge.
An ElectronThe electron is a subatomic particle that carries a negative electric charge. It has no known components or substructure, and therefore is believed to be an elementary particle. An electron has a mass that is approximately 1/1836 that of the proton.
That may refer to the electric charge.
It is a subatomic particle , with positive electric charge of 1 elementary charge .
1. photon has zero charge.there may also be sub atomic particle with zero charge.
An alpha particle has the charge 2+ and the mass 4.
The Neutron
Alpha particles are helium nuclei and consist of two protons and two neutrons. Their electric charge is +2 (+1 from each proton), and their mass number is 4, one for each proton and neutron. To describe their mass in other ways, it is 4.001506179125 atomic mass units, or 6.64465675 x 10-25 kg.
beta
Charge would be 1+ (2+ plus 1- = 1+)