+The **atomic nucleus** is the dense, central core of an [Atom](/wiki/atom), containing nearly all its mass. Composed of [Protons](/wiki/protons) and [Neutrons](/wiki/neutrons), its unique identity defines the element itself.
+## See also
+- [Electron](/wiki/electron)
+- [Isotopes](/wiki/isotopes)
+- [Atomic Number](/wiki/atomic_number)
... 1 more lines