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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 |
| Opposite Charges | Attract |
| Like Charges | Repel |
| charge of atom | neutral |
| Located inside the nucleus | protons and neutrons |
| located outside the nucleus | electrons |
| orbit of particles surrounding the nucleus | electron cloud |
| number of electrons the first orbital holds | 2 |
| number of electrons the second orbital holds | 8 |
| charge of nucleus | no charge (neutral) |
| neutron | neutral, no charge |
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