Edexcel IGCSE Chemistry 2017 Covalent bonding 1

This video covers the following specification points:

1.44 Know what a covalent bond is formed between atoms by the sharing of a pair of electrons
1.45 Understand covalent bonds in terms of electrostatic attractions
1.46 Understand how to use dot-and-cross diagrams to represent covalent bonds in:
Diatomic molecules, including hydrogen oxygen, nitrogen, halogens and hydrogen halides
Inorganic molecules including water, ammonia and carbon dioxide
Organic molecules containing up to two carbon atoms, including methane, ethane, ethene and those containing halogen atoms