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Atoms
Atomic Structure, History, and Practice Problems
| Question | Answer |
|---|---|
| The Charge of a Proton is | +1 |
| The Charge of an Electron is | -1 |
| The charge of a neutron is | 0 (neutral) |
| The Mass of a Protons is | 1 amu |
| The Mass of a Neutron is | 1 amu |
| The Mass of an Electron is | 0 (negligible) |
| How do you calculate the mass of an atom? | Protons + Neutrons |
| What does the atomic number ALWAYS tell you about the atom? | The number of protons the atom has What element it is |
| These subatomic particles are in the nucleus | Protons and Neutrons |
| These subatomic particles surround the nucleus | electrons |
| This person was the first to suggest that atoms existed | Democritus |
| This person was the first to have experimental evidence for the existence of atoms | Dalton |
| This person used cathode ray tubes to discover the electron | Thomson |
| This person developed the "plum pudding" model of the atom | Thomson |
| This person discovered the nucleus of the atom | Rutherford |
| This person did the "Gold Foil Experiment" | Rutherford |
| This person was the first to suggest that atoms were mostly empty space | Rutherford |
| This person suggested that electrons orbited the nucleus in set energy levels | Bohr |
| It is now believed that electrons surround the nucleus in this | An electron "cloud" |
Created by:
R.Baur
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