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### 11 Cards in this Set

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 What are the five types of chemical substances? 1. atomic 2. molecular 3. covalent lattice 4. ionic 5. metallic What did Niels Bohr assumed to explain the Rydberg equation? His assumption is based on the understanding that electrons can only have discrete energies because only certain wavelength of light are absorbed. What was the problem with Niels Bohr's assumption? He assumed that electronics have a particle like characteristic rather than wave-like. Why must polar coordinates be used? 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 What does the Schrodinger's Equation explain? It relates the total energy of the electron to the wavefunction for the electron What are some boundary conditions for the Schrodinger's Equation? What determines the energy level of electrons? Only n 6g vs 7p 7p is higher energy b/c 7>6 even though g has more electrons that p What does ψ stand for in the Schrodinger's equation? 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. What does ψ^2 stand for in the Schrodinger's equation? The value of ψ^2 is related to the probability of finding the electron at a particular point in space. How can one determine the number of lobes? 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