Chemistry T1 - Elements, Compounds, Mixtures, Pure substance, Seperation methods

elements

→a substance which is made up of only one type of atoms
→elements classified into 2 different types as metals or non-metals

compounds

→formed when 2 or more elements are chemically combined

mixtures

→formed when elements and/or compounds are just mixed together with no chemical reactions involved

pure substances

→pure substances contain only 1 type of particle →1 type of bond
→fixed melting and boiling points
→used as a physical method to determine whether the substance is pure

impure substances

→different melting and boiling points

seperation methods

1.filtration
2.crystallisation
3.simple distillation
4.fractional distillation
5.paper chromatography

filtration

→undissolved solid in liquid→solid/liquid

crystallisation

→solution→dissolved solid from solution

simple distillation

→solution→solvent from the solution

miscible liquids

→liquids which doesnt form into layer

fractional distillation

→miscible liquids→liquids

paper chromatography

→mixture of dyes→no product