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11 Cards in this Set
- Front
- Back
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What is the Bohr model? |
The electron circles the nucleus in specific orbits of definite, fixed energy. |
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What is wrong with the Bohr model? |
Electrons do not move in specific paths/orbits around the nucleus. Also, his model did not work for larger atoms beyond hydrogen. |
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What is Heisenberg’s uncertainty principle? |
It’s impossible to determine simultaneously both the position and velocity of an electron. (Just the act of looking at it moves it.) |
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What is the Pauli exclusion principle? |
No two sets of electrons in an atom can have the same set of four quantum numbers. So, no more than two electrons per orbital. |
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What is Hund’s rule? |
Orbitals of equal energy are each occupied by a second electron. |
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Name the four quantum numbers. |
N L M sub L M sub S |
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Describe n. |
Principle quantum number = main energy level. |
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Describe L. |
Angular momentum quantum number = shape of orbital. |
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Describe M sub L |
Magnetic quantum number = orbital orientation. |
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Describe M sub S. |
Spin quantum number = electron spin. |
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What is an orbital? |
A 3D Region That describes the probable location of an electron. |
