Matter in chemistry is defined as any substance that has mass and occupies space by having volume. It is composed of atoms, which are made up of subatomic particles such as protons, neutrons, and electrons
. Matter exists in various states or phases, including solids, liquids, gases, and plasma, and can transition between these states depending on temperature and pressure
. Chemically, matter includes elements and compounds, which are unique forms of matter with constant chemical composition and characteristic properties. Elements consist of a single type of atom, while compounds are formed by atoms of different elements chemically bonded together. Matter can undergo chemical reactions to form new substances
. Fundamentally, matter is made up of elementary particles like quarks and leptons, which combine to form protons, neutrons, and electrons—the building blocks of atoms
. The properties of matter, such as mass, density, color, hardness, melting and boiling points, and solubility, help describe and differentiate different types of matter
. In summary, matter in chemistry is any physical substance made of atoms or their constituent particles, possessing mass and volume, existing in various states, and capable of chemical change
