+At the heart of every [atom](/wiki/atom) lies the atomic nucleus, a compact and positively charged core. Composed of [protons](/wiki/protons) and [neutrons](/wiki/neutrons), it harbors nearly all of an atom's mass and defines its fundamental elemental identity, held together by the [strong force](/wiki/strong_force).
+## See also
+- [Atom](/wiki/atom)
+- [Protons](/wiki/protons)
+- [Neutrons](/wiki/neutrons)
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