3 states:

Matter can change between the 3 states: solidto liquid (melting), liquid to gas (evaporation),gas to liquid (condensation), liquid to sold(freezing), solid to gas (sublimation), and gas tosolid (deposition)

Particle theory of matter: matter is composedof tiny objects called particles, particles havespace between them, particles are always inmotion, and particles in a substance attracteach other.

Classifies as a pure substance or a mixture

Pure substances are either elements orcompounds.

Mixtures can be heterogenous or homogenous.

Can be easily reversed

Colour and lustre

Density

Hardness

Viscosity

Chemical reaction

Chemical change

formed when nonmetals combine

can be any of the 3 states at room temperature

good insulators, poor conductors

Low boiling points

First element always stays the same

second element changes to end in "ide"

Identify symbol of first element

Identify symbol of second element

Add subscripts to indicate the amount

John Dalton

J.J Thomson

Earnest Rutherford

James Chadwick

Niels Bohr

Quantum Mechanical Model: electrons exist inspecific energy levels as a cloud

Alloys are a mixture of two or more metals

Metals: shiny, silver or grey in colour, greatconductors, and malleable.

Nonmetals: there are only 17 elements

Metalloids have metallic and nonmetallicproperties and are semiconductors.

Protons

Neutrons

Electrons

Each element has its own symbol

First letter is capital and the second islowercase.

Atomic number

Atomic mass

Ions

Periods

Groups

High melting points

forms crystals

dissolves in water

becomes said at room temperature

First element stays the same

Second element ends in "ide"