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11 Cards in this Set
- Front
- Back
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What are the five types of chemical substances?
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1. atomic
2. molecular 3. covalent lattice 4. ionic 5. metallic |
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What did Niels Bohr assumed to explain the Rydberg equation?
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His assumption is based on the understanding that electrons can only have discrete energies because only certain wavelength of light are absorbed.
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What was the problem with Niels Bohr's assumption?
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He assumed that electronics have a particle like characteristic rather than wave-like.
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Why must polar coordinates be used?
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It's used because the system chosen must be consistant with the symmetry of an atom. It needs spherical symmetry.
r=distance from the nucleus Y=is the angle of the projection from the y-axis |
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What does the Schrodinger's Equation explain?
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It relates the total energy of the electron to the wavefunction for the electron
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What are some boundary conditions for the Schrodinger's Equation?
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What determines the energy level of electrons?
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Only n
6g vs 7p 7p is higher energy b/c 7>6 even though g has more electrons that p |
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What does ψ stand for in the Schrodinger's equation?
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The value of ψ has not direct physical significance. It is a measure of the amplitude of the wavefunction at that particular point in space and may have a positive or negative sign.
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What does ψ^2 stand for in the Schrodinger's equation?
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The value of ψ^2 is related to the probability of finding the electron at a particular point in space.
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How can one determine the number of lobes?
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Remember that n>l if l>n then there is no lobes.
ex. 4h n=4 l=5 (0,1,2,3,4,5:::s,p,d,f.g.h) there will be no lobes b/c n<l Some d and higher orbitals, such as dz2 may have fewer nodes because they are combinations of two orbitals |
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How can one determine the number of nodes?
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Some d and higher orbitals, such as dz2 may have fewer nodes because they are combinations of two orbitals
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