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See the Web Links to the left for a pdf file with a Periodic Table which shows the electronic configuration (in shorthand notation) for each element. You can also use the WebElements link and select each element to view its electronic configuration.

Shorthand notation marks the electron configuration starting with the noble gas element in the previous row. To write out the complete configuration, just write down the configuration for that noble gas in place of the name of the noble gas (you may have to do this several times if you are writing the configuration of an element towards the bottom of the periodic table -- just keep working backwards until you get to the first 1s orbital.

For example:

The shorthand configuration for iodine (I) is listed as: [Kr]5s24d105p5.

First, we must add on the configuration for krypton (Kr) in front:

[Ar]4s23d104p65s24d105p5.

But since Kr is given in terms of argon (Ar), we must keep going:

[Ne]3s23p64s23d104p65s24d105p5.

And again for neon (Ne):

1s22s22p63s23p64s23d104p65s24d105p5

Now we've got everything, so the complete electron configuration for iodine (I) is: 1s22s22p63s23p64s23d104p65s24d105p5

Follow the aufbau chart for order of filling - 1s, 2s, 3p, 4s, 3d, 4p, 5s, 4d, 5p and so on. The following link explains electron configuration and gives the configuation for elements 1 - 20:http://www.scribd.com/doc/10542/Electron-Configuration-Worksheet?from_email_04_friend_send=1

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