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Chapter 5
Vocabulary
16
Chemistry
10th Grade
12/15/2008

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Term
Energy Levels
Definition
Fixed energies an electron can have
Term
Quantum
Definition
The amount of energy required to move an electron from one energy level to another energy level.
Term
Quantum Mechanical Model
Definition
The modern description of the electrons in atoms, comes from the math solutions to the Schrodinger Equations
Term
Atomic Orbital
Definition
Thought of as a region of space in which there is a high probability of finding an electron.
Term
Aufbau Principle
Definition
electrons occupy the orbitals of lowest energy first.
Term
Pauli Excusion Principle
Definition
an atomic orbital may describe at most two electrons.
Term
Hund's Rule
Definition
States that electrons occupy orbitals of the same energy in a way that makes the number of electrons with the same spin direction as large as possible.
Term
Amplitude
Definition
The wave's height from zero to the crest.
Term
Wavelength
Definition
is the distance between the crests
Term
Frequency
Definition
The number of wave cycles to pass a given point per unit of time.
Term
Electromagnetic Radiation
Definition
inclued radio waves, microwaves, infrared waves, visible light, ultraviolet waves, X-rays, and gamma rays.
Term
Spectrum
Definition
When sunlight passes through a prism, the different frequecies separate into a
Term
Atomic Emission Spectrum
Definition
The frequencies of light emitted by an element separate into discrete lines
Term
Ground State
Definition
When the electron has its lowest possible energy.
Term
Photons
Definition
Light Quanta
Term
Heisenberg Uncertainty Principle
Definition
states that it is impossible to know exactly both the velocity and the position of a particle at the same time.
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