Atoms

Element

Substance containing only one type of atom

Compound

Substance containing two or more different types of elements chemically bonded together

Mixture

Substances containing different types of elements not chemically combined together

Conservation of mass

Atoms can neither be created or destroyed. Ions must be balanced

Filtration

Separates large insoluble particles from a liquid

Evaporation

Leaves behind crystals of dissolved substances if heated gently

Distillation

Condenses the evaporated solvent and then collects it

Fractional distillation

Separates liquids depending g on their boiling points

Chromatography

Used to identify different mixtures in a dye. Lighter particles move further up the paper

Solid

Regular arrangement and vibrate in fixed positions. They can’t be compressed

Liquid

No regular arrangement, they are able to move past each other. Can’t be compressed

Gas

Far apart from each other and move randomly at fast speed. They can’t be compressed

Atomic number

Number of protons in a nucleus. Number of protons is the number of electrons

Mass number

Number of protons + neutrons.

To find = mass number - electrons/protons

Isotope

Same element with a different number of neutrons