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ChemKRMS123
| Question | Answer |
|---|---|
| Molecules | 2 atoms combined |
| Atom | Smallest particle of an element |
| Element | A pure substance that can't be broken |
| Protons and neutrons | inside an atom- holds it together |
| Compound | 2 or more elements that are chemically combined |
| Chemistry | Study of matter, its properties and how it changes |
| Boiling point | The temperature at which a liquid changes to a gas |
| Melting point | The temperature at which a solid changes to a liquid |
| Physical change | To alter the form of a substance, but not its identity |
| Chemical change | When substances combine or break apart to form new substances |
| Mixtures | 2 or more substances that are in the same place but not chemically combined |
| Pure substances | Are made of only one kind of matter and has definate properties |
| Metalloids | Has metal and non-metal properties |
| Matter | What makes up everything in the universe |