Periodic table
In this collection of GCSE chemistry revision videos, we explore the many aspects of the periodic table including what are the elements of the period table and how they are arranged.
Group 1 and 7 elements: Footage of lithium, sodium and potassium in water. Explaining trends in reactivity caused by the electrons in the outer shell.
Testing for ions: Detecting the presence of sulfate with barium chloride, and carbonate with dilute acid and limewater.
Periodic table: Elements are organised into groups according to their properties. The key is their outer shell of electrons.
Chemical changes
In this chemistry revision collection, you will find out about what happens during a reaction and how a reaction can be measured. We will explain all about the rate of a reaction and what electrolysis is.
Electrolysis: An experiment to break apart the ionic compounds, copper chloride and sodium chloride, using electrodes to separate the positive and negative charges.
Rates of reaction: Experiments to measure the rate of a reaction and ways to increase it by altering the limiting factor.
Dynamic equilibrium: How altering the temperature and pressure around a reversible reaction shifts the point of equilibrium.
Increasing reaction rates: Four ways to speed up reactions by controlling concentration, temperature, catalysts and surface area.
Particle theory: How particles can be made to move faster and speed up a reaction, using concentration, temperature and surface area.
Catalysts: Substances that speed up reactions by lowering the activation energy while remaining unchanged themselves.
Metals
How does oxygen affect metals? And what is the Haber process? Learn about heat, pressure and how losing oxygen affects metals in this metals revision collection.
Oxidation and reduction: How gaining and losing oxygen affects metals, such as when iron and steel rust.
Haber process: Producing ammonia for industrial use through a reversible reaction, and how this is sped up using catalysis, heat and pressure.
Properties of matter
In this chemistry revision collection about properties of matter you will find out more about the three states of matter and the properties of substances. Explore ionic bonding, covalent bonding, nanoscience and smart materials with the short videos below.
Ionic bonding: The process of losing or gaining an electron, resulting in a positively or negatively charged ion, which bond with their opposite.
Covalent bonding: How atoms fill their outer shell by sharing electrons, forming larger covalent structures.
Nanoscience and smart materials: Uses, and potential dangers, of nano-scale particles in substances like sunscreen, antiseptics and self-cleaning glass.