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Atoms and Molecules
| Question | Answer |
|---|---|
| Matter | anything that has mass and takes up space |
| Atom | the smallest unit of an element |
| Proton | a positive particle in the nucleus |
| Neutron | a particle with no charge in the nucleus |
| Electron | a negative particle that moves around the nucleus |
| Nucleus | the center of an atom where protons and neutrons are found |