Subatomic particle
A alpha particle is a helium-4, written 24He, nucleus, and it is composed of a pair of protons and a pair of neutrons fused together. It's charge is +2. A beta particle could be either a beta + particle, which is a positron, or a beta - particle, which is an electron. The electron (beta -) has a charge of -1, and the positron (beta +) has a charge of +1. In summary, the alpha is +2, the beta minus is -1, and the beta plus is +1.
A colloid is not a subatomic particle.
A quark is the smallest particle in matter.
The proton is a positively charged subatomic particle
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