Chater 7a - Electronic Structure of Atoms
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18 terms
Terms | Definitions |
|---|---|
 dalton's model | model that had empty sphere and the difference was in size |
| thompson's model | model that had electrons in a positive mass |
| rutherford's model | model that had a nucleus and electrons moving around |
| light | electromagnetic radiation that can produce a visual sensation |
| quantum | the amount of energy needed to move an electron from one energy level to another |
| photon | a quantum of electromagnetic radiation |
| photoelectric effect | The emission of electrons from a metal when light shines on the metal |
| Bohr's model | model with different energy levels and protons and neutrons in the nucleus |
| uncertainty principle | -thought by HEISENBERG -said its impossible to know the position and velocity of an electron at the same time |
| quantum mechanical model | -thought by SCHRODINGER -proposed that the electrons in an atom moved in a very complex paths around the nucleus |
| orbital | a region in an atom where up to 2 electrons can be -"s"= spherical -"p"=dumbbell -"d"=daisy -"f"'=fantastic |
| principle quantum number (n) | -quantum number that indicates the Bohr ring of the electron -integers starting at 1 |
| azimuthal quantum number (ℓ) | -quantum number that indicates the possible number of sublevels in a ring -for a given n, integers going from 0 to (n-1) |
| magnetic quantum number (mℓ) | -quantum number that indicates which orbital an electron is in -a sublevel is made up of 1 or more orbitals -for a given ℓ, mℓ goes from -ℓ to ℓ including 0 |
| electron spin quantum number | -electrons can spin counterclockwise or clockwise -within an orbital electrons can NOT be spinning in the same direction -values are +1/2, -1/2 |
| ground state | the lowest energy state of an atom |
| excited state | a state in which an atom has a higher potential energy than it has in its ground state |
| DeBroglie | person that hypothesized that if light could exist in a dual nature than maybe all matter moved ina wavelike manner -concluded electrons moved around the nucleus in wave like pattern |
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