electron
Hadron
Quark
molecule
Compund
Meson
element
Neutrino
A molecule is the smallest particle in a chemical element or compound that has the chemical properties of that element or compound.
An elementary particle with half-integer spin, that interacts only via the weak subatomic force and gravity. Its mass is tiny compared to other subatomic particles.
An elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons.
A subatomic particle with a negative elementary electric charge.
A species of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z). There are 118 elements that have been identified.
A chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition.
Any particle that is made from quarks, anti-quarks and gluons. (If you want to learn more about quarks and gluons.
Hadronic subatomic particles composed of one quark and one antiquark, bound together by the strong interaction.
