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Atomic Theory and Structure
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| A | B |
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| Protons | Positively charged |
| Neutrons | Neutral particle |
| Electrons | Negatively charged |
| Nucleus | Mass of Atom |
| Protons + Neutrons | Atomic Mass |
| Number of Protons | Atomic Number |
| Democritus | Atomus |
| Thompson | Discovered Electrons |
| Rutherford | Discovered Nucleus |
| Dalton | Proposed first atomic theory |
| amu | atomic mass unit |
| Avogadro's number | 6.022 E 23 |
| Mole | SI unit for amount |
| Identifies the element | number of protons |
| Molar Mass | Mass in 1 mole |
| Isotope | Different number of neutrons |
| Volume of the atom | electron cloud |
| Found in the nucleus | protons and neutrons |
| Located outside nucleus | electrons |
| Law of Multiple Proportions | NO, NO2 and NO3 |
| Law of Definit Proportions | Same ratio of elements |
| Law of Conservation of Mass | Neither created or destroyed |
| Conversion factor g to moles | Molar Mass |
| Conversion factor mol to atoms | Avogadro's number |
| Has no or little mass | electrons |
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