Reference Terms
from Wikipedia, the free encyclopedia


Arsenic is a chemical element in the periodic table that has the symbol As and atomic number 33.

This is a notoriously poisonous metalloid that has three allotropic forms; yellow, black and grey.

Arsenic and its compounds are used as pesticides, herbicides, insecticides and various alloys.

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