Structural isomerism
Structural isomers are molecules with the same molecular formula but a different arrangement of atoms … you need to recognise
Author: Sarah Parkes
How to name an alkane
I’ve tried to simplify the rules for naming alkanes in this video – I don’t think this requires notes so
Aromatic, aliphatic and alicyclic hydrocarbons
It’s always important to start at the beginning! There is so much terminology in organic chemistry, from the naming of
Continue readingAromatic, aliphatic and alicyclic hydrocarbons
Shapes of molecules and polyatomic ions
Working out the shape of a molecule or a bond angle always starts with a dot and cross diagram, even
What is intermolecular bonding?
Understanding the different types of intermolecular bond is usually straight forward. Describing them in writing is not 😳. All intermolecular
Electronegativity and polar bonds
Electronegativity is the power of an atom in a molecule to attract electrons toward itself – we are typically talking
Giant covalent (macromolecular) networks and simple molecules
More good news! The properties of diamond and graphite and silicon dioxide have’t changed! On a more serious note though,
Continue readingGiant covalent (macromolecular) networks and simple molecules
Molecular orbital theory
This is the second modern theory of bonding, the first being valence bond theory. In molecular orbital theory covalent bonds
Using valence bond theory to explain sigma and pi bonds
Our familiar model of covalent bonding is largely based on the Lewis model, with atoms sharing pairs of bonding electrons
Continue readingUsing valence bond theory to explain sigma and pi bonds
Covalent bonding
Once again, showing how covalent bonds are formed using dot and cross diagrams is simpler at A level than at