+Protons are fundamental [Subatomic Particles](/wiki/subatomic-particles) residing in the nucleus of every [Atom](/wiki/atom). They carry a positive electric charge and define an element's identity. Along with neutrons, they constitute most of an atom's mass.
+## See also
+- [Neutrons](/wiki/neutrons)
+- [Electrons](/wiki/electrons)
+- [Quarks](/wiki/quarks)
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