Arsenic
Symbol, Uses, & Facts
arsenic
arsenic (As), a chemical element in the nitrogen group (Group 15 [Va] of the periodic table), existing in both gray and yellow crystalline forms.
| atomic number | 33 |
|---|---|
| atomic weight | 74.921595 |
| melting point | |
| (gray form) | 814 °C (1,497 °F) at 36 atmospheres pressure |
| density | |
| (gray form) | 5.73 g/cm3 at 14 °C (57 °F) |
| (yellow form) | 2.03 g/cm3 at 18 °C (64 °F) |
| oxidation states | -3, +3, +5 |
| electron config. | 1s22s22p63s23p63d104s24p3 |
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