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12 Cards in this Set
- Front
- Back
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Why did Rutherford's atomic model need to be replaced? |
Rutherford's atomic model could not explain the chemical properties of elements. |
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What was the basic new proposal in the Bohr model of the atom? |
Bohr proposed that an electron is found only in specific circular paths, or orbits, around the nucleus.
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What does the quantum mechanical model determine about electrons in atoms? |
The quantum mechanical model determines the allowed energies an electron can have and how likely it is to find the electron in various locations around the nucleus.
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How do two sub levels of the same principal energy differ from each other? |
Each energy sub level corresponds to an orbital of a different shape, which describes where the electron is likely to be found. |
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What are the three types of orbitals and what do they look like? |
S - Spherical P - Dumbbell Shape D - Two dumbbell shape (Clover Leaf) (Four types, on four different axis's, and one type that has a ring) |
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Explain why the actual electron configurations for some elements differ from those assigned using the aufbau principle. |
Some actual electron configurations differ from those assigned using the aufbau principle because half-filled sub levels are not as table as filled sub levels, but they are more stable than other configurations. |
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How are wavelength and frequency of light related? |
The wavelength and frequency of light are inversely proportional to each other. |
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Describe the cause of atomic emission spectrum of an element. |
When atoms absorb energy, electrons move into higher energy levels. These electrons then lose energy by emitting light when they return to lower energy levels.
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How is the change in electron energy related to the frequency of light emitted in atomic transitions? |
The light emitted by an electron moving from a higher to a lower energy level has a frequency directly proportional to the energy change of the electron.
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How does quantum mechanics differ from classical mechanics? |
Classical mechanics adequately describes the motions of bodies much larger than atoms, while quantum mechanics describes the motions of subatomic particles and atoms as waves.
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As wavelength of light increases...? |
The energy decreases |
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In the third energy level...? |
A maximum of 18 electrons are allowed |
