Atoms/compounds/elements

• An atom is the smallest part of an element that can exist. It has a fixed number of protons and electrons all substances are made from this
• An element is a substance that is made from only one type of atom. can’t be broken down into simpler substances
• A compound is a substance made up of two or more different elements chemically combined together
• The number of protons and identical to electrons
• A mixture consists of two or more elements or compounds not chemically combined together. It is possible to separate the components of a mixture using physical processes
• compounds are formed by elements combining with other elements to form new substances through chemical reactions
• Compounds have a fixed number of elements unlike mixtures