A set of chemical symbols showing the elements present in a compound and their relative proportions.
chemical formula
The theory that all matter is made up of tiny indivisible particles
Atomic theory
The arrangement of electrons in the energy levels of an atom or molecule
electronic configuration
The levels around the atomic nucleus of an atom. It is where the electrons are found
electron shell
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
ion
The symbolic representation of a chemical reaction in the form of symbols and formulae
chemical equation
General types of chemical reactions that occur based on what happens when going from reactants to products
General reactions
Reaction of acid and base, forming a salt and water.
neutralisation
a salt of carbonic acid
metal carbonate
A salt of carbonic acid in which only one hydrogen atom has been replaced
Metal hydrogen carbonate
Tablets or liquid medicines that relieve heartburn.
Antacid
Reaction that releases energy
Exothermic
Reaction that absorbs energy.
Endothermic
Rapid reaction with oxygen that releases energy as heat or light.
Combustion
A reaction in which two reactants combine to form one product.
Synthesis
Breaking down of a substance into simpler substances.
Decomposition
An equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products
Balanced equation
The charge of an element which is determined by the number of outer shell electrons. The difference between the number of protons and electrons.
Valency
is an ion consisting of exactly one atom.
Monatomic ion
an ion contains more than one atom, even if these are of the same element.
Polyatomic ion
