8F

Elements and compounds combine in

• mixtures

• chemical reactions

• chemical formulas

• physical changes

A chemical that supplies oxygen in a chemical reaction is known as a(n)

• rusting

• water

• oxygenator

• oxidizer

Matter...

• has mass

• is the same things as energy

• takes up space

• is measured in joules

Atoms

• make up all matter

• are the smallest unit of an element

• are all the same

• don't really exist

Protons

• are positive

• are negative

• have no charge

Neutrons

• are positive

• are negative

• have no charge

Electrons

• are positive

• are negative

• have no charge

You know what element an atom is because of

• the number of protons

• the number of electrons

• the number of neutrons

• it's impossible to know

A compound is

• Made of only one kind of atom

• a molecule made of more than one element chemically combined

• always explosive

• a mixture of two or more elements that aren't chemically combined

Every substance has characteristics physical properties, such as

• ability to burn (flammability)

• melting point

• conductivity

• ability to react with oxygen