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These are called subatomic particles. Each element has a definite number of subatomic particles, which make up the center of the atom, called the nucleus.
The proton, a subatomic particle that carries a positive charge, is made up of 3 quarks. The proton is one of few particles that are stable alone. Protons positive charge is 1.602 x 10^-27 coulomb. Protons have a mass of 1.67 x 10^-27 kg. Along with neutrons, they account for most of the mass in atoms. The number of protons in the nucleus of an atom determines what kind of element it is. The atomic number of an element is equal to the number of protons in each atom's nucleus...
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