Excited State Electron Configuration Example
Electron Configurations
The organisation of electrons in the atomic orbitals of an atom is called the electron configuration. Electron configurations can be determined using a periodic table.
Terminology :
The ground state configuration is the lowest energy, nearly stable arrangement.
An excited country configuration is a higher energy arrangement (it requires free energy input to create an excited state).
Valence electrons are the electrons utilised for bonding. These are the 'outer' electrons (i.e. the electrons which travel furthest away from the nucleus) and the highest free energy electrons.
Cadre electrons are electrons that under 'normal' reaction conditions are chemically inert and are in the completely filled inner free energy levels.
Yous should be familiar with how to determine an electron configuration for an atom and place the valence electrons. You should exist able to place both ground and excited state electron configurations.
Case 1 : What is the ground state electron configuration of carbon ?
Answer : Carbon is the sixth element in the periodic table, hence the atomic number Z = 6 , and therefore has 6 electrons.
simple 1sii 2stwo 2ptwo short class [He] 2sii 2p2 orbital energy diagram
Example ii: What is the ground state electron configuration of aluminum, Al ?
Answer : Aluminum is the 13th element in the periodic table, atomic number Z = 13, and therefore has thirteen electrons:
simple 1s22s22psix3s23pane short form [Ne] 3sii3p1 orbital energy diagram 
You should at present attempt some more questions.
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Excited State Electron Configuration Example,
Source: http://www.chem.ucalgary.ca/courses/351/mechanistic_etext/Ch01/ch1-2-3.html
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