Atom [FREE]

: Particles with no charge, also found in the nucleus. They provide stability and contribute to the atom's mass.

: This is the count of protons in the nucleus. For example, Hydrogen has 1 proton, while Gold has 79. : Particles with no charge, also found in the nucleus

An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. They are incredibly small, typically around 100 picometers across. Atomic Structure Atoms are made of three main subatomic particles: Licensed by Google : Particles with no charge