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Atom
Everything is made up of them
Molecules
Atoms bonded together in a group
Pure natural materials
Made up of one substance
Element
A simple substance made up of one type of atom
Compound
Contain more than one type of atom
Pierodic table
All 118 known elements
Metals
Good conductor of heat and electricity
Strong and flexible
Shiny
High melting point
Non metal
Low melting point
Brittle
Non conductors of heat and electricity
Not shiny
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