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Science
| Question | Answer |
|---|---|
| Nucleus | the center of an atom that has most of its mass |
| Proton | a particle in the nucleus of an atom that carries one unit of positive eletric charge |
| Nuetron | a particle in the nucleus of an atom that has no eletric charge |
| Electron | a particle in the space outside the nucleus of a atom that carries one unit of negative electric charge |
| Molecule | a particle more than one atom ajoined |