BYU lesson 5 notes
Chem tutor
Features of the model
- Circular orbits
- Orbits corresponds to unique electron energy
- Further out the orbit, higher the electron energy
- Only certain orbit energies allowed
- Electrons jump from one orbit to another
- When electrons jump to lower orbit, gives off the difference in energy
as proton
Gravitational energy- gradual changes versus step changes:
The electron can only find itself on energy steps as it moves away from the
nucleus, just as you can only find yourself on gravitational energy steps as
climb the stairs.
Quantum theory
Quantized
The idea that some things in nature like the energies in nepton can only have
certain values not values in between.
Whole numbers for n
Angular momentum = nh/2pie
Orbit radii & electron jumps
Orbit radius varies as (orbit number)^2
At n= infinity
E=0
Lecture
The Bohr model of the atom
, According to the bohr model of the atom, the energies of the electrons
around an atom..
- Are quantized
The wavelength of light varies _____ as its frequency
- Inversely (or indirectly)
The energy of Bohr orbits in a H atom varies as …
1/n^2
In the bohr model of the atom, as n gets large the energy of the electron
approaches…
Zero
Which has the largest numerical value (i.e, absolute value – biggest number
ignoring the sign ) of electron energy in the Bohr model?
N=1
Coming to grips with the energy well
Lowest orbits have :
- Lower energy
- Biggest numbers
- Energy levels closer together at higher energies
Quantum atomic model
How are photons absorbed and emitted? (what model light are we using ?)
Why did copper giver off a green light, while Sr gave off red?
Unique electron energy levels for each type of atom
When atoms emit light:
Energy of photon emitted size of energy gap between electron energy states
Chem tutor
Features of the model
- Circular orbits
- Orbits corresponds to unique electron energy
- Further out the orbit, higher the electron energy
- Only certain orbit energies allowed
- Electrons jump from one orbit to another
- When electrons jump to lower orbit, gives off the difference in energy
as proton
Gravitational energy- gradual changes versus step changes:
The electron can only find itself on energy steps as it moves away from the
nucleus, just as you can only find yourself on gravitational energy steps as
climb the stairs.
Quantum theory
Quantized
The idea that some things in nature like the energies in nepton can only have
certain values not values in between.
Whole numbers for n
Angular momentum = nh/2pie
Orbit radii & electron jumps
Orbit radius varies as (orbit number)^2
At n= infinity
E=0
Lecture
The Bohr model of the atom
, According to the bohr model of the atom, the energies of the electrons
around an atom..
- Are quantized
The wavelength of light varies _____ as its frequency
- Inversely (or indirectly)
The energy of Bohr orbits in a H atom varies as …
1/n^2
In the bohr model of the atom, as n gets large the energy of the electron
approaches…
Zero
Which has the largest numerical value (i.e, absolute value – biggest number
ignoring the sign ) of electron energy in the Bohr model?
N=1
Coming to grips with the energy well
Lowest orbits have :
- Lower energy
- Biggest numbers
- Energy levels closer together at higher energies
Quantum atomic model
How are photons absorbed and emitted? (what model light are we using ?)
Why did copper giver off a green light, while Sr gave off red?
Unique electron energy levels for each type of atom
When atoms emit light:
Energy of photon emitted size of energy gap between electron energy states
