The periodic table shows all the elements



Molecules and chemical bonding


Ionic Bonds

Covalent Bonds

Octet rule: Part I Part II Part III

The hydrogen molecule

Lewis diagrams

Oxidation numbers

Molecular orbitals

Electron density



The Chemical bond


Covalent bonds are made between atoms that share their electrons. The result is the formation of molecules. The atoms don't need to be ionised in order to stick to the others.

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A molecules of sucrose is shown below:

Sucrose is a sugar (the termination -ose is present in all sugars), so that it is formed of carbon, hydrogen and oxygen (carbohydrate).


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