An electrolyte is a substance that conducts electricity in solution or molten state. Electrolytes vary in their ability to conduct electricity. Strong electrolytes are those substances that are capable of conducting a large amount of electric current. Such substances are usually ionic and will completely ionize in solution. For example sodium chloride.

Weak electrolytes on the other hand ionize only partially in solution and therefore will carry only small amount of electric current. For example ethanoic acid.

Non- electrolytes  are substances that do not conduct electricity in the molten state or in solution. For example toluene.

An electrode  is a metal rod or carbon rod through which current enters or leave an electrolyte.

They are two types of electrodes the positive electrode called the anode and the negative electrode called the cathode.

Anode is the positive electrode and it is usually connected to the positive terminal of the battery.

Cathode is a negative electrode usually connected to the negative terminal.

Ion is an electrically charged atom or a group of atoms formed by gaining or losing electrons.

Anion is a negatively cgarde ion usually attracted to the anode during electrolysis. It can therefore be called anode ion from where its name is derived.

Cations  is a positively charged ions usually attracted to the cathode during electrolysis. It can therefore be called cathode ions from where its name is derived.