Basic Biochemistry 2024 ALREADY PASSED

Atom - basic unit of matter Nucleus - center of atom electron - negatively charged particle in electron cloud(atomic number = number of protons) proton - positively charged particle at center of atom(atomic number & number of electrons) element - pure substance that consists entirely of one type of atom. isotopes - atoms that differ in the number of neutrons they contain radioactive isotopes - nuclei are unstable and break down at a constant rate over time compound - substance formed by 2 or more elements in definite proportions ionic bind - one or more electrons are transferred from one atom to another ions - electrically charged atoms that have gained or lost electrons. covalent bond - a chemical bond that involves sharing a pair of electrons between atoms in a molecule