Week 3: Chemistry Vocabulary #1

A system of groups and periods to organize elements.

• atomic mass
• periodic table
• molecule
• atomic number

Two or more atoms joined tightly together.

• atomic mass
• periodic table
• molecule
• atomic number

The number of protons in the nucleus of an atom.

• atomic mass
• periodic table
• molecule
• atomic number

A substance made up of two or more elements joined together by a chemical bond.

• compound
• element
• mixture
• atom

The building block of all matter.

• compound
• element
• mixture
• atom

The mass of an atom of a single chemical element.

• atomic mass
• periodic table
• molecule
• atomic number

A pure substance made of one kind of atom.

• compound
• element
• mixture
• atom

A combination of two or more substances that aren’t chemically joined.

• compound
• element
• mixture
• atom

A subatomic particle in the nucleus of an atom that has no charge.

• proton
• neutron
• electron
• valence electron

A subatomic particle in the nucleus of an atom that has a positive charge.

• proton
• neutron
• electron
• valence electron