Tiny particles are the smallest components of matter that make up everything in the universe. An ATOM is the smallest particle of an element, consisting of a nucleus surrounded by electrons. A MOLECULE is two or more atoms bonded together. A GRAIN is a small, hard particle of a substance. A SPECK is a very small particle or spot. An ELECTRON is a subatomic particle with a negative charge. A WHIT is a very small amount or particle. A MOTE is a tiny particle of dust or other matter. An IOTA is an extremely small amount. An ION is an ATOM or MOLECULE with an electric charge. A FLECK is a small spot or SPECK. A proton is a subatomic particle with a positive charge.