Atomic Structure and Classification of Matter

The building block of matter; smallest unit of an element ________

• atom

• molecule

• compound

• element

Subatomic particle inside the nucleus; positive charge ___________.

• proton

• electron

• neutron

• nucleus

Subatomic particle inside the nucleus; no charge (neutral) _________

• electron

• proton

• neutron

• nucleus

Subatomic particle that orbits the nucleus; negative charge _________.

• proton

• neutron

• electron

• nucleus

Contains protons and neutrons in the center of the atom _______.

• proton

• electron

• neutron

• nucleus

Anything that takes up space and has mass _________.

• compound

• element

• matter

• atom

Made of only 1 type of atom (pure); can't be broken down into simpler substances _____________

• atom

• element

• compound

• mixture

Composed of 2 or more elements chemically combined _______.

• mixture

• element

• compound

• atom

The smallest particle of a substance that retains the chemical and physical properties of a substance; describes particles of a pure covalent substance (element or compound) __________.

• molecule

• mixture

• atom

• particle

Combination of 2 or more substances physically combined; substances maintain their original properties _______.

• element

• mixture

• compound

• atom