| Term | Definition |
|---|
| atom | basic unit of matter |
| nucleus | center of the atom containing protons and neutrons |
| electron | negatively charged particle circulating around the nucleus |
| proton | positively charged particle of an atom |
| neutron | neutral particle of an atom |
| element | pure substance consisting entirely of one type of atom |
| isotope | atoms of the same element but with a different number of neutron |
| compound | substance formed by the chemical comination of two or more compounds in definite proportion |
| ionic bond | Formed when one or more electrons are transferred from one atom to another |
| ion | positively or negatively charged atom |
| covalent bond | forms when electrons are shared between atoms |
| molecule | smallest unit of a compound |
| van der waals force | force of attraction between large molecules |
| cohesion | an attraction between molecules of the same substance |
| adhesion | an attraction between molecules of different substances |
| mixture | two or more elements or compounds that are physically mixed but not chemically combined |
| solution | mixture where all components are even distributed |
| solute | the substance that is dissolved |
| solvent | the substance in which the solute is dissolved |
| suspension | mixtures of water and nondissolved materials |
| pH scale | measures the concentration of hydrogen ions in a solution |
| acid | solution with a higher concentration of hydrogen ions than water |
| base | solution witha lower concentration of hydrogen ions than water |
| buffer | a weak acid or weak base that prevents sudden changes in pH |
Combine with other sets
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