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5.1 Notes
1) Draw a picture of:
a) the Rutherford model of the atom.
1911 Ernest Rutherford identified positive nucleus
b) the Bohr model of the atom.
c) the Schrodinger model of the atom.
Where are subatomic particles?
What was the problem with his model?
2) What was inadequate about Rutherford's model?
Nov 7­8:03 AM
1913 Niels Bohr improved upon Rutherford's model
Electrons found in specific orbits around nucleus
Each orbit has fixed amount of energy Energy levels
Higher energy levels
quantum of energy (quantus = "how much")
amount of energy needed to move an e‐ from one energy level to another
*e‐ can exist in a specific energy level
*cannot be between energy levels
The Quantum Mechanical Model
It's all about probability...
determines allowed energies of e and probability of finding e­ in locations around nucleus
1926 ­ Schrodinger equation­this model of the atom is mathematical...all about probability
There is no exact path of e­ around nucleus
in QMM, likely to find e­ in a fuzzy cloud around nucleus Atomic Orbitals
­regions with high probability of finding e­
­Energy levels named by principal quantum no. (n)
# of Orbitals
Oct 26­11:50 AM
2n2 = Maximum number of electrons that can occupy a principal energy level
Electron Configurations
Oct 26­11:51 AM