- Created by: n0t-dishwasher-safe
- Created on: 08-12-17 15:00
- All substances are made of atoms.
- The periodic table lists all of the chemical elements, with eight main groups, each containing elements with similar chemical properties.
- Elements are made of only one type of atom.
- Compounds contain more than one type of element.
- An atom has a tiny nucleus at its centre, surrounded by electrons in shells.
1.2 CHEMICAL EQUATIONS
- No new atoms are ever created or destroyed in a chemical reaction.
- The total mass of reactants always equals the amount of products (Law of Conservation of Mass)
- There is the same number of each type of atom on each side of a balanced symbol equation.
- State symbols give extra information in balanced symbol equations.
- (s) = solids
- (l) = liquids
- (aq) = aqueous solutions
- (g) = gases
1.3 SEPARATING MIXTURES
- A mixture is made up of two or more substances that are not chemically combined.
- Mixtures can be separated by physical means, such as filtration, crystallisation, and simple distillation.
1.4 FRACTIONAL DISTILLATION AND PAPER CHROMATOGRAPHY
- Fractional distillation is effective in order to separate miscible liquids, using something called a fractionating column.
- This separation is possible…