User talk:Pedro Silva

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Revision as of 09:46, 10 November 2006 by imported>Robert Tito (modification of chemistry page)
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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!

modification of chemistry page

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!