Study guides, Class notes & Summaries

matter - anything that occupies space atom - smallest unit of matter that retains elemental properties element - type of atom that has certain characteristics atomic mass - protons + neutrons chemical bonds - interactions between atoms protons - positively charged particles neutrons - the particles of the nucleus that have no charge electrons - negatively charged particles covalent bonds - sharing of electrons ionic bonds - transfer of electrons proteins - chains of amino acids, enzyme...