May 26th, 2010, 05:33 PM
found this on you tube - helped me understand the Periodic Table a lot:
http://www.youtube.com/watch?v=TSI25...os=pUCP069S5q4
So basically the elements are defined by the way they react to x-rays? Is this still the case?
Also useful info on how the elements relate to each other - comments and criticisms welcome..................
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