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S8P1.a
Distinguish between atoms and molecules
| Term | Definition |
|---|---|
| 1. atom | the smallest unit of an element that maintains the properties of an element |
| 2. element | a substance that can't be separated or broken down into simpler substances by chemical means. |
| 3. nucleus | in Physical Science, an atom's central region, which is made up of protons and neutrons |
| 4. proton | a subatomic particle that has a positive charge and that is found in the nucleus of an atom |
| 5. neutron | a subatomic particle that has no charge and that is found in the nucleus of an atom |
| 6. electron | a subatomic particle that has a negative charge |
| 7. atomic number | the number of protons in the nucleus of an atom; the atomic number is the same for all atoms of an element |
| 8. neutral | having no overall charge |
| 9. atomic mass | the mass of an atom expressed in atomic mass units |
| 10. chemical symbol | a one or two letter code that represents an element |
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31colyou
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