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July 31, 2015

Homework Help: Chemistry

Posted by Cierra on Wednesday, October 3, 2007 at 8:23pm.

Can someone check these answers for me? I know some if not all are wrong, but I don't know which ones they are.

-Substances are elements or compounds.
Sometimes
-Elements exist as molecules.
Never
-Compounds are molecules.
Sometimes
-Mercury is an element.
Always
-Ions possess charges.
Always

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