Electrons in Atoms

Orbital Notation and Electron Configuration

Emily Parker
Page #6

Electron Configurations

Steps on how to write a Electron Configuration: You count the number of electrons you have and use as many orbital sub levels as you need to hold all your electrons. Be sure to always fill the lowest energy levels first.
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Orbital Notation

Steps to draw an Orbital Notation:


Sample Problem

Silicon
1s22s22p63s23p2
**the above is shown in the diagrams below**

• s subshells have 1 orbital
x2- 2 e-
• p subshells have 3 orbitals
x2- 6 e-
• d subshells have 5 orbitals
x2- 10 e-
• f subshells have 7 orbitals
x2- 14 e-
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QUANTUM #'s

N- ENERGY LEVEL
L-SHAPE
M-ORRIENTATION
S-SPIN

WAVELENGTHS

SHORT: high frequency & high energy
LONG: low frequency & low energy
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