HOW DO i FIND THE ELECTRON CONFIGURATION OF AN ELEMENT?

Answer 1

1. The orbitals are filled successively in the order of increasing energy i.e.
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d,5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p, 6f.
2. The s- orbital contains 2 electrons, p-orbital contains 6 electrons, d-orbital contains 10 electrons and f-orbital contains 14 electrons.

For eg. ELECTRON CONFIGURATION OF Si is asked having atomic no. 14, therefore it's electronic configuration is:
1s2, 2s2, 2p6, 3s2, 3p2.

Answer 2

This online periodic table has that info (among lots of other facts about each element)

http://www.chemsoc.org/viselements/pages/pertable_j.htm

Click on the element, then scroll down to where it says "Chemical Data", then click on HTML underneath that.

The electron config is listed on the 'HTML' page (you can also read it as a PDF file).

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Answer 3

http://en.wikipedia.org/wiki/Electron_configuration

There you go!

Try "Hyperphysics" - schrodinger equation

Answer 4

periodic chart.