Nucleus
Definition
The nucleus is at the center of an atom consisting mainly of protons and neutrons. It carries most of an atom's mass but occupies only a tiny space compared to the total size of the atom.
Analogy
Consider atoms as mini solar systems. In this case, think about how all planets revolve around one central point - our Sun. Similarly, all electrons revolve around one central point in an atom, which is the nucleus.
Related terms
Atomic Number: The number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
Nucleons: Protons and neutrons collectively are known as nucleons.
Radioactive Decay: A process by which an unstable atomic nucleus loses energy by radiation. It can involve the release of alpha or beta particles from the nucleus.
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