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ARSENIC
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Atomic Symbol |
As |
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Atomic Weight |
74.92159 |
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Atomic Number |
33 |
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Electron Configuration |
2-8-18-5 |
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Oxidation States |
±3, +5
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State of Matter |
Solid heavy metal-low melting |
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Melting Point |
814 °C |
HISTORY,
BACKGROUND & USES:
Discovered in 1649. Arsenic is found in both the yellow and gray crystalline forms.
Gray arsenic is very brittle and tarnishes in the air. It sublimes
under high heat. Because arsenic is highly toxic, it makes a good
weed killer and insecticide. The radioactive isotopes have been
used in medical diagnostic procedures.
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