C2: Atoms, Elements & Compounds KEYWORDS

Smallest part of an element

Two or more different types of atom chemically bonded together

Two or more atoms (could be the same or different) chemically bonded together

Negatively charged subatomic particle that orbits the nucleus of an atom

Written as words or symbols to show the reactants and products in a chemical reaction

Shows the ratio of elements in a molecule

Contains different substances not chemically joined together

Particle found in the nucleus of atoms with no overall charge

Positively charged particle found in the nucleus of atoms

Substance which contains only one type of atom

Substances found on the left hand side of a chemical equation

Substances found on the right hand side of a chemical equation

One or two letters which represent the name of an element

Reaction which gives out heat

Reaction which takes in heat