Chemistry Unit 1

Matter can be either a

pure or a mixture substance

A pure substance cannot

be separated into simpler substances by physical means

A compound is

a molecule made of more than one element held together with a chemical bond (ex: water molecule H20)

A mixture

is a combination of two ro more substances that do not form chemical bonds.

A homogenous mixture

will look the same throughout. Particles are uniformly distributed.

A heterogeneous mixture

will look like it is composed of different substances. Particles are not uniformly distributed.

Mass is a

physical property

Volume is

a physical property

Magnetism is

a physical property

Melting Point is

a physical property associated with a physical change

Reactivity with acid is a

chemical property associated with chemical change

Reactivity with oxygen is

a chemical property associated with a chemical change

Reactivity with water is

a Chemical Property associated with a Chemical Change

Mixtures

made of 2 or more substances that don’t form chemical bonds. Substance making up mixture has different physical properties