Chemistry Basic Definitions

 

Chemistry Basic Definitions

1. Solid changing into a liquid

Melting

2. Liquid changing into a solid

Freezing

3. Gas/vapour changing into a liquid

Condensation

4. Liquid changing into a gas/vapour

Evaporation

5. Temperature at which a solid turns into a liquid

Melting Point

6. Temperature at which a liquid changes into a solid

Freezing Point

7. Temperature at which a liquid changes into a vapour at atmospheric pressure

Boiling Point

8.  The random movement of particles from an area of a high concentration to an area of low concentration

Diffusion

1.  A single substance

Pure substance

2.  The unit particle of an element

Atom

3.  The number of protons in one atom of the element

Proton number

4.  A volatile compound easily changes into a vapour. It has a low boiling point

Volatile

5.  A mixture of a solute, usually a solid, dissolved in the solvent, a liquid

Solution

6.  A substance that reacts with colourless spots on a chromotogram and makes them visible as coloured spots

Locating agent 

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