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CHEMISTRY vocab
| Term | Definition |
|---|---|
| MATTER | Anything that has mass and occupies space |
| ELEMENT | A substance composed of a single kind of atom that cannot be broken down into other substances by chemical physical means |
| PERIODIC TABLE | An organized table of all the known elements |
| ATOMIC NUMBER | The number of protons or electrons in an element |
| ATOMIC SYMBOL | An abbreviation for the element name |
| ATOMIC MASS | the mass of protons + neutrons (also called atomic weight or mass number) |
| COMPOUND | A substance in which 2 or more elements are chemical joined in a set ratio |
| MIXTURE | 2 or more substances that are mixed together but not chemically combined |
| ATOM | the smallest unit of an element that retains (or keeps) the properties of that element |
| NUCLEUS | the central core of an atom that contains the protons and neutrons |
| PROTON | small, positively charged particle in the nucleus of an atom |
| NEUTRON | small, uncharged particle in the nucleus of an atom |
| ELECTRON | a tiny negatively charged high energy particle that moves in the space around the nucleus of an atom |
| ELECTRON SHELLS | fixed orbit or path that electrons travel in around the nucleus |
| MOLECULE | 2 or more atoms that are bonded together |
| CHEMICAL BOND | the force that holds 2 or more atoms together |
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