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Science Tese
Atoms unit
| Term | Definition |
|---|---|
| Orbital | Probable location of an electron in an energy level |
| Mole | 6.022 x 10^23 particles in an element: measurement |
| Atomic Number | The number of protons in an atom |
| Nucleus | The positively charged dense core of an atom |
| Isotope | An element type that has a different number of neutrons than protons |
| Valence Electrons | Electrons in the outer most energy level of an atom |
| Mass Number | Number of protons and neutrons in an atom |
| Rutherford | Did the gold foil experiment that said that atoms were mostly empty space with a solid core in the center and electrons floating around |
| Democritus | Greek dude who came up with atomos which was the idea that there was a point in which something can't be broken any farther |
| Thompson | He came up with the plumb pudding model which said that atoms were big positively charged masses with electrons spread throughout it |
| Bohr | Discovered that electrons aren't randomly placed, they are arranged in energy levels |
| Proton | Positive charge, mass = 1.67 x 10^-27, found in the nucleus |
| Electron | negative charge, mass = -9.11 x 10^-31, found in the e- cloud |
| Neutron | no charge, mass = 1.67 x 10^-27, found in the nucleus |
Created by:
Phoebe64
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