Search over 10,000 free study notes

Groups and periods are just ways to divide and categorise elements in the periodic table according to their properties- be it physical or chemical. A period is the horizontal line and all the elements in ...

As branching increases the boiling point decreases because there are fewer points of contact. This also means van der Waals forces are weaker in branch chained isomers and thus less energy is required to ...

If a reaction is exothermic, it means that it gives out energy, heating up its surroundings, and so the products have less energy than the reactants.

If a reaction is endothermic, it means that it ...

Activation energy is the amount of energy that the reactants need in order to react and become the products. For example, when burning natural gas (also called methane, or CH₄), you need a spar...

pottasium dichromate (K₂SO₄) is an example of an oxidising reagent. If added to a primary alcohol, under reflux, carboxcylic acid will form, a secondray alcohol will form a ketone an...