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Electronic transition
Test for November 6
76
Chemistry
11th Grade
11/04/2009

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Term
Electronic translation
Definition
The movement of an electron from one energy level to another
Term
Electronic translation
Definition
represented by means of an arrow
Term
Why was Bohr's model accepted?
Definition
It was the FIRST model of them atom that could explain the hydrogen spectrum
Term
What is given off when an electron goes to a lower energy level?
Definition
A proton of electromagnetic radiation
Term
How can an electron go to a higher energy level?
Definition
Only by absorbing energy from an outside source
Term
When is an atom in an excited state?
Definition
When one of its electrons has been promoted to a higher energy level
Term
When an atom is in the ground state, where are the electrons?
Definition
In the lowest possible energy levels
Term
Emission spectrum of hydrogen atoms
Definition
1. Lymon Series
2. Balmen Series
3. Paschen Series
Term
Emission Spectrum of Hydrogen atoms
Definition
Consists of thre series of lines
Term
Lymon Series
Definition
- Produced by Uv photons
- Due to transition of electrons from higher energy levels to n=1
Term
Balmen series
Definition
- Produced by visible photons
- Due to the transitions of electrns from higher energy levels to n=2
Term
Paschen Series
Definition
- Produced by i.n. photons
- Due to the transition of electrons from higher energy levels to n=3
Term
What could Bohr's model of the atom explain?
Definition
The spectra of single atoms with one electron
Term
The wavelike properties of electrons are useful for what?
Definition
Magnifying objects
Term
Why was Rutherford's model replaced?
Definition
1. It couldn't explain why metals of compounds give off characteristic colors when heated
2. The chemical properties of the elements
Term
In Bohr's model, electrons are arranged in what?
Definition
Specific, concentric, circular paths or orbits around the nucleus
Term
In Bohr's model, electrons in a particular circular path have a what?
Definition
Fixed energy
Term
In Bohr's model, electrons in the cuircularpath closest to the nucles have the?
Definition
Lowest energy
Term
In Bohr's model, electrons in the circular path furthest away from the nucles have?
Definition
The highest energy
Term
In Bohr's model, electrons can?
Definition
They can jump from one energy levels to another
Term
In Bohr's model, the amount of energy needed to move an electron from its present energy level to the next higher one is called?
Definition
A quantum of energy
Term
In Bohr's Model, what gets closer the higher you go?
Definition
Energy levels
Term
In Bohr's model, the elecgtron goes up the ladder and gets further away from the nuclus, what happens to the energy level?
Definition
Increases
Term
Quantum Mechanical model
Definition
Change Cloud model
Term
Quantum mechanical model
Definition
Named after an area of physics which uses advanced math to study atoms and subatomic particles
Term
Who was one of the main people who developed the quantum mechanical model?
Definition
Schrodinger
Term
The quantum mechanical model tells us atoms have:
Definition
- Prinicipal energy levels
- Sublevels
- Orbitals
Term
What is similar to Bohr's energy levels?
Definition
Principal energy levels
Term
1, 2, 3, etc. What are these numbers called that are associated with principal energy levels?
Definition
Principal quantum numbers; These numbers are represented by the letter m
Term
Principal energy levels conatin?
Definition
One or more sublevels
Term
Each principal energy level has:
Definition
- N sublevels
- N squared orbitals
- 2 N squared electrons when completely filled
Term
Sublevels of a prinipal energy level have:
Definition
- Equal energies when the atom contains only 1 electron
- Differen energies when the atom has more than 1 electron
Term
Are not the same as orbits
Definition
Orbitals
Term
Region in space in which it is most likely to find an electron
Definition
Orbital
Term
Each orbital can have a maximum of?
Definition
2 electrons (Called an orbital pair)
Term
Used to describe the placement of electrons in orbitals
Definition
Orbital diagrams
Term
What is a half filled orbital represented by?
Definition
A box or circle containing a single arrow pointed either up or down
Term
What is a filled orbital represented by?
Definition
A box or circle containing 2 arrows, one pointing up and the other pointing down
Term
A shorthand notation describing the arrangement of electron in an atom
Definition
Electron configuration
Term
Principle energy level
Definition
Coefficent
Term
Type of orbital or sublevel
Definition
Letter
Term
Orientation of orbital (optional)
Definition
Subscript
Term
Number of electrons in an electron configuration
Definition
Superscript
Term
Equals the total number of electrons in the atom
Definition
Superscript Total of the Electron configuration
Term
Equals Z, the atomic number (total number of protons), when the atom is neutral
Definition
Superscript total of the Electron Configuration
Term
How to simplify Electron configurations:
Definition
1. Do not use subscripts
2. Use mobile gas symbols
Term
Electrons enter orbitals of lowest energy first
Definition
Aufbou principal
Term
An atomic orbital may have at most 2 electrons and they must have opposite spins
Definition
Pauli exclusion principal
Term
When electrons occupy orbitals of equal energy, one electron enters each orbital until all the orbitals contain one electron with the same spin
Definition
Hund's Rule
Term
Ground state Electron configuration Rules
Definition
1. Aufbou principle
2. Pauli exclusion principal
3. Hund's rule
Term
Filled sublevels are more stable than what?
Definition
partially filled sublevels
Term
Half filled sublevels are not as stable as filled sublevels, but are more stable than?
Definition
Other configurations
Term
The quantu mechanical model grew out of the study of what?
Definition
Light
Term
Who thought of light as consisting of particles?
Definition
Isaac Newton (1642-1727)
Term
By 1900, most scientists believed light was a?
Definition
Wave
Term
A ____ is a wiggle (vibration) in time through space
Definition
Wave
Term
The distance between 2 neighboring crests
Definition
Wavelength (lambda)
Term
Number of wave cycles to pass a given point per unit of time
Definition
Frequency (v, nu)
Term
The waves height from its origin (zero point) to the crest
Definition
Amplitude (A)
Term
An arrangement of different types of waves acording to wavelength and frequency
Definition
Spectrum
Term
Very well known spectrum
Definition
Electromagnetic spectrum
Term
Inversely related
Definition
Frequency and wavelength
Term
As wavelength increases-
Definition
Frequency decreases
Term
The product of any 2 variables that are inversely related is equal to:
Definition
A constant
Term
What are the two things that the modern theory of light says that light has?
Definition
A wave of nature and a particle of nature
Term
The modern thoery of light says that light is composed of what?
Definition
Photons
Term
A particle of ligh which has a frequency and wavelength
Definition
Photon
Term
Bundle of energy
Definition
Photon
Term
Producedf by electrons
Definition
Photon
Term
Can travel billions of miles thrugh space and tell us the atoms that are present in the stars
Definition
Photons
Term
Light is often composed of many different types of light each having a different?
Definition
Wavelength and frequency
Term
Different types of light can often seperated by what?
Definition
Using a prism
Term
When does every element emit light?
Definition
When it is excited by the passage of an elctric discharge through its gas or vapor
Term
When light from excited elements pass through a prism, you get a?
Definition
Atomic emission spectrum
Term
What does each element of light have?
Definition
Its own, unique emission spectrum
Term
Each line in the emission spectrum is produced by an:
Definition
Electronic transition
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