Numbers of molecules and atoms Animation Play

Optical isomerism of amino acids Student activity Play

Orbital energy and order of assignment to subshells Student activity Play

Orbits of electrons Animation Play

Order of filling of the shells by electrons Animation Play

Organic compound Simulation Play

Origin of crude oil (1) Student activity Play

Origin of fossil fuels Student activity Play

Other aromatic hydrocarbons Student activity Play

Other physical properties of alkanes Student activity Play

Overlapping of atomic orbitals Animation Play

Oxidation Animation Play

Oxidation and reduction reactions Student activity Play

Oxidation and reduction reactions Student activity Play

Oxidation of aldehydes and ketones Student activity Play

Oxidation of hydrogen on platinum Animation Play

Oxidation state of the phosphorus atom in phosphate(V) ion Animation Play

Oxidation states Animation Play

Oxidation states Student activity Play

Oxidation states Whiteboard exercise Play

Oxidation states of halogens Animation Play

Oxidation states of the p-block elements in their commonest chemical compounds Student activity Play

Oxidation states of the s-block elements Student activity Play

Oxygen atom and covalent bonding Animation Play

p orbitals Illustration Play