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Atoms and elements
| Term | Definition |
|---|---|
| Periodic Table | Standardized table that organizes the elements by properties. |
| Element | A substance that cannot be broken down into another substance. |
| Nucleus | Central core of an atom. |
| Molecule | Two or more atoms joined together by a chemical bond. |
| Chemical symbol | A letter or letters that abbreviate an elements name. |
| Chemical reaction | Process in which one or more substances are changes into one or more different substances. |
| Neutron | Particle in the nucleus of an atom that has no charge. |
| Electron | Particle in an atom that has a negitive electric charge. |
| Proton | Particle in the nucleus of an atom that has a positive charge. |
| Compound | Substance made of two or more elements that are chemically combined. |
| Chemical formula | A shortland way to describe the chemical makeup of a compound. |
| Atom | Smallest particle of an element that still has the properties of that element. |