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Physical Science
Matter
| Term | Definition |
|---|---|
| atom | the smallest particles of matter (the building blocks of life |
| atomic mass | the combined mass of both the protons and the neutrons in an atom |
| atomic number | the number of protons in the nucleus of an atom |
| electron | the subatomic particle around the outside of an atom that has a negative charge |
| element | a pure substance that cannot be broken down into other substances |
| law of conservation of mass | the law that states that matter cannot be created nor destroyed |
| matter | anything that has mass and takes up space (volume) |
| molecule | a particle made of two or more elements bonded together |
| neutron | the subatomic particle in the nucleus of an atom that has NO charge |
| proton | the subatomic particle in the nucleus of an atom that has a positive charge |
| sublimation | the process of a solid changing directly into a gas |
| evaporation | the process of a liquid changing into a gas |
| condensation | the process of a gas changing into a liquid |