Unit B - Atoms, Elements And Compounds

Anything that has mass and volume

A measurement of the quantity of matter in an object.

A measure of how big an object is or how much space a fluid takes up.

A change from a solid to a gas

A change from gas into a solid

The temperature at which a solid turns into a liquid

The point at which a which a liquid turns into a solid (same temperature as melting point)

• All matter is composed of very tiny particles • All particles have spaces between them • Particles present in matter are always in motion • The particles in a substance attract each other

A characteristic that describes a substance

• Pure Substances - Mixtures

Made up of only one kind of matter and had a unique set of properties such as colour, hardness, boiling point and melting point

A substance that cannot be broken down into any simples substance by chemical means

A pure substance made from two or more elements that are combines together chemically

A mixture in which the different substances that make up the mixture are visible

A cloudy mixture in which tiny particles of one substance are held within another

A mixture in which the different substances that make it up are not individually visible

A characteristic of a substance that can be observed or measured

• Colour and Lustre • Conductivity • Density • Ductility • Hardness • Malleability • Viscosity

The ability of a substance to change into a new substance or substances

A formation of a new substance or substances

A process in which chemical change occurs

Change in: • colour • odour • temperature • the production of light • the formation of a solid inside a liquid • the production of a new gas

The ability of a substance to react quickly with oxygen to produce heat and light

• Absorbs heat during reaction • Combustible • Forms has when heated • Reacts with acid • Reacts with water • Emits heat during reaction • Emits light durning reaction • Forms a precipitate (solid) in a solution