What is an atom? An atom is fundamental piece of matter which it is made up of protons, neutrons and electrons
What is an element An element is a pure substance made up of one type of atom.
Metals Metal is an element, compound, or alloy that conducts heat and electricity. Copper
Non metals A non-metal is an element on the periodic table that does not have the properties of a metal element such as malleability. Non metals are usually found as gases in nature or weak, brittle solids. Phosphorus
Compounds A chemical compound is a pure chemical substance consisting of two or more different chemical elements.
Chemical reaction A chemical reaction is a process that leads to the transformation of one set of chemicals substances to another.
Identifying chemical reactions Heat and light gas or precipitate
A physical change is reversible, a chemical change is not. For example, the freezing of water would be a physical change because it can be reversed, whereas the burning of wood is a chemical change - you can't 'unburn' it Chemical and physical reactions
Factors affecting a reaction rate? Temperature, concentration, size of particles or using a catalyist