Chemesty - C1

Solid

1) Solids have strong forces of attraction between particles, which hold them in a fixed position in a very regular lattice arrangement.

2) The particles don't move, all solids keep a defined shape and volume  

3) The Particle vibrates, the hotter the solid is the more they vibrate 

Liquids

1) Some force of attraction between particles, free to move past each other, tend to stick together.

2) Don't keep a defined shape and will flow to fill the bottom of a container, keep the same volume.

3) Particles constantly moving with random motion, the hotter the liquid the faster they move, causes liquid to expand slightly

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Gas

1) No force of attraction between particles, free to move, travel in straight lines and only interact when they collide.

2) Don't keep a definite shape or volume, will always fill any container, exert pressure when they bounce off the wall.

3) Constantly moving with random motion, the hotter the gas the faster they move, when heated will either expand or the pressure increases.

John Dalton described atoms as solid spheres made up of different elements. (early 19th century)

JJ Thomson concluded that atoms weren't solid spheres