1. Elements, compounds and mixtures Matter Pure substances ElementsCompounds Mixture

2. Elements, compounds, mixtures Use animation “elements, compounds and mixtures” on www.echalk.co.uk to complete the table below. User name = echalk2@dulwich-shanghai.cn; pass word is echalkwww.echalk.co.ukechalk2@dulwich-shanghai.cn Type of substance Particle model detailsexamples

3. Compounds and mixtures Use page 31 in your textbook to compare compounds and mixtures by completing the table on page 2 in your handout When finished: echalk: play tetris game to “identify elements, compounds and mixtures”

4. Elements, compounds and mixtures Matter Pure substances (fixed properties) Elements (one type of atom only) (metals – nonmetals) Compounds (two or more types of atoms chemically combined) Mixture (have properties of components) Elements and compounds mixed together and not chemically combined

5. definitions Element  Substance made of one type of atom Compound  Substance made of two or more different atoms chemically combined Mixture  Substance made from different atoms that have not chemically combined

6. Periodic table

8. Particle models

9. Compound and mixture CompoundMixture Two or more different atoms chemically combined Has fixed properties e.g. melting and boiling points, chemical reactions,.. Has a fixed formula e.g. H 2 O Can only be separated with a chemical reaction Two or more different atoms mixed together and not chemically combined Has no fixed properties but the properties of those substances that are in it Has no formula Can easily be separated as components have not chemically combined