User talk:Pedro Silva

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Revision as of 08:46, 10 November 2006 by imported>Robert Tito (chemistry)
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Welcome, Pedro! --Larry Sanger 02:33, 1 November 2006 (CST)

chemistry

You deleted the part in the chemistry page that distictively states what differentiates chemical reactions from physical: chemical reactions only involve electrons of atoms/molecules. I would like to put that very basic and important thing back!