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metals and nonmetals-year 7 project

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ytrewq | 14:50 Thu 04th Oct 2007 | Science
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In a group of these metals and nonmetals Bromine, Cardon, Chlorine, Copper, Iron, Mercury, Nickel, Selenium and Sulphur which substances would be ''difficult to group''. I was thinking mercury being a liquid metal and cardon being a non metal which conducts electricity. Would you include any others? Nothing to heavy as its only year 7, thanks
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How about Carbon

Graphite conducts electricity but diamond does not.

Selenium is also a funny one it is a non metal but conducts electricity but better when illuminated than in the dark.

http://en.wikipedia.org/wiki/Selenium

If you find them on the periodic table

http://www.stanford.edu/class/educ299x/images/ assignment_1_teaser.jpg

The more to the left the more metalic, the more to the right the more non metalic


Cu, Fe, Hg and Ni are definitely metals and Cl and S are definitely non-metals. C and Se are difficult to group as they have properties of metals and non-metals.
Cu, Fe, Hg and Ni are definitely metals and Cl and S are definitely non-metals. C and Se are difficult to group as they have properties of both metals and non-metals.
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