Saturday, October 23, 2010

Lesson 9 Quantum Mecahnics

·         Bohr Theory
§  The electron is a particle that must be in orbital in the atom
·         Quantum Theory
§  The electron is like a cloud of negative energy or a wave
§  Orbitals are areas in 3D space where the electrons most probably are
§  The energy of the electron is in its vibrational modes — like notes on a guitar string
§  Photons are produced when high energy modes change to lower energy modes

·         S Orbitals (sphere)
§  There is 1 suborbitals
§  Each orbital holds 2 electrons
§  Total electrons = 2
·         D Orbitals
§  There are 5 suborbitals
§  Each contains 2 electrons
§  Total electrons = 10

·         F Orbitals
§  There are 7 suborbitals
§  Each contains 2 electrons
§  Total electrons = 14


 1. The electron Configuration of Li
     1s2, 2s1
Example #2
How many and what type of electrons are in Potassium
1s2, 2s2, 2p6, 3s2, 3p6, 4s1

Example #3

How many and what types of electrons are in Strontium ion
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6
How many and what types of electrons are in Krypton
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6

How many and what types of electrons are in Bromine ion
1s2, 2s2, 2p6, 3s2, 3p6, 4s2, 3d10, 4p6

Example 3 are called isoelectronic

~ Kelly Bui~

posted by chemistry11 @ 3:36 PM

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