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Chapter 5 key concepts
Chem 5 test
15
Chemistry
10th Grade
03/10/2013

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Term
Rutherfords atomic model
Definition
Could not explain the chemical properties of an element
Term
Bohr
Definition
Proposed that an electron is found only in specific circular paths, or orbits, around the nucleus
Term
Quantum mechanical model
Definition
Determines the allowed energies an electron can have and how like.y it is to find an electronic various locations around the nucleus
Term
Energy sub levels
Definition
Each energy us level corresponds to an orbital of a different shape, which describes where the electron is likely to be found
Term
Three rules
Definition
Tell you how to find the electron configurations of an atom
They Re aufbau principle, the Pauli exclusion principle and Hunds rule
Term
Exceptional electron configurations
Definition
Some actual configurations differ from those assigned using the affability principle because half filled sun levels are not as stable as filled us levels, but they are never more stable than other configurations
Term
C=_lambda x v
Definition
Product of frequency and wavelength always equals a constant
Term
Wavelength
Definition
Wavelength and frequency of light are inversely proportional to each other. As the wavelength of light increases, the frequency decreases.
Term
Atomic spectra
Definition
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
Term
Atomic spectra 2
Definition
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.
Term
Quantum mechanics
Definition
Classical mechanics adequately describes the motions of bodies larger than atoms, while quantum mechanics describes the motions of subatomic particles and atoms as waves
Term
Photoelectric effect
Definition
Process in which electrons are ejected by metals when certain wavelengths of light shine on them
Term
De Broglies equation
Definition
Predicts that all matter exhibits wavelike motions
Term
Planks constant
Definition
6.6262 x 10-34 Js
Term
Principle energy levels, sublevels and orbitals
Definition
Prin. energy level. #sublevels. Type sub level
n = 1. 1. 1s (1 orbital)
n = 2. 2. 2s (1 orbital) 2p (3 orbitals)
n = 3. 3. 3s (1 orbital), 3p (3 orbitals)
3d (5orbitals)
n= 4. 4. 4s (1 orbital) 4p (3 orbitals)
4d (5 orbitals) 4f (7 orbitals)
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