Chemestry - structure of atom

Atoms are really god damn small. Thats what she said.

• their are protons neutrons an electrons in atom
• protons are positive
• electrons are negative
• neutrons are neutral
• the atomic number is the number of protons in atom.
• mass number is number of protons and neutrons.

Stable atoms

• stable atoms have a full outer shell

• unstable atoms are atoms that have don't have a full outer shell

Chemestry - seperation of mixtures

Separation of mixtures

• Filtration is used to separate a insoluble thing for a liquid eg sand an water.
• Evaporation is used to seperate a soluble thing like salt from water.
• Distillation is used to make WHISKEY an to seperate two different liquids with different boiling points. like ALCOHOL and water.
• Chromatograpy is used to seperate some dissolved supstances in a mixture like ink in a pen
• Crystalisation is wierd.

• a mixture is when to or more substance are combined but could be taken away from each other.

Chemestry-states of matter and elements

solid   fixeed shape-cannot flow-strong forces between particles
liquid   not fixed-can flow-weak forces holding together
gas   not fixed shape-can flow-very weak forces holding together

      General structure of solids, liquids and gases

• Matter is made of atoms and molecules
• The matter in a soli is held together in a rigid structure
• The matter in a liquid are able to move around.
• the matter in gas is free and can move around as it wants. 

      Change of state

• melting point is the temperature when a solid changes into a liquid.
• boiling point is when a liquid changes into a gas.

      Elements

• elements are substances that cannot be made simpler.
• an atom is the smallest part of an element but still retains the properties. still has the same stuff in it.
• a molecule is the smallest part of a element that is itself, eg two oxygen molecules that are bonded together