Homework Help: Elements

Posted by Twilight lover on Thursday, February 5, 2009 at 1:56pm.

how can someone find out which element is a more chemically active nonmetal from looking at the Periodic Table? What element is a black crystal that hs 4 electrons in its outermost energy level?

Elements - DrBob222, Thursday, February 5, 2009 at 2:31pm
The most active non-metals are to the upper right of the periodic table. Look at group 17 (VIIA) which would be fluorine. The black crystal probably is carbon. Look in group 14(IVA).[The most active metal is to the lower left.]

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