Elements, compounds and mixtures

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 echalk

• Type of substance Particle model Characteristics about particle model

Examples

element

compound

mixture

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”

Elements, compounds and mixtures

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

Periodic table

Particle models

Compound and mixtureCompound Mixture

•Two or more different atoms chemically combined•Has fixed properties e.g. melting and boiling points, chemical reactions, ..•Has a fixed formula e.g. H2O•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