Reference Terms
from Wikipedia, the free encyclopedia


Selenium is a chemical element in the periodic table that has the symbol Se and atomic number 34.

It is a toxic nonmetal that is chemically related to sulfur and tellurium.

It occurs in several different forms but one of these is a stable gray metallike form that conducts electricity better in the light than in the dark and is used in photocells

Note:   The above text is excerpted from the Wikipedia article "Selenium", which has been released under the GNU Free Documentation License.
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