Atoms and Molecules: Benchmark

smallest, negatively charged subatomic particle

• proton

• neutron

• electron

smallest particle of matter

• atom

• molecule

• compound

• mixture

arranges chemical elements in order of atomic number

• orbital

• Periodic Table

• Rare Earth Elements

center of an atom

• electron

• orbital

• nucleus

make up the atmosphere

• Rare Earth Elements

• Noble Gases

• metals

the number of protons

• atomic number

• electron

• element

• nucleus

used in cell phones

• Noble Gases

• Rare Earth Elements

• mixture

• orbital

a region of space in an atom where electrons are found

• neutron

• proton

• nucleus

• orbital

a combination of two or more substances that do NOT change chemically

• compound

• mixture

• element

• atom

two or more atoms that stick together

• compound

• mixture

• element

• molecule