Order from Smallest to largest.
1. Electron
2. Single atom of an element
3. Atomic nucleus
4. Mineral
A negatively charged subatomic particle known as an electron can exist either free or attached to an atom (not bound). Protons, neutrons, and the electron that is attached to an atom are the three main types of particles that make up an atom. The atom's nucleus is made up of protons, neutrons, and electrons collectively. Some elements are monatomic, which means that they have just one atom in each of their individual molecules.
The nucleus is the positively charged region at the center of each atom (plural, nuclei). It is composed of two types of closely grouped subatomic particles. The particles are neutrons, which have no electric charge, and protons, which have a positive electric charge.
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