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Atoms
Structure of the Atom
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| A | B |
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| Electron | Negatively Charged |
| Proton | Positively Charged |
| Number of Protons | Atomic Number |
| Number of Protons + Number of Neutrons | Mass Number |
| Nucleus | Core of the Atom |
| Smallest known elementary particles of matter | Quarks |
| Same number of protons and different number of neutrons | Isotopes |
| Opposite Charges | Attract |
| Like Charges | Repel |
| Atom | Electrically Neutral |
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Chemistry & AP Biology Instructor |
Prentiss High School |
| MS |
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