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General information about Arsenic |
| Arsenic |
| As |
| 33 |
| Metalloids |
| 15 |
| 4 |
| p |
| metallic grey |
| 74.92160(2) g·mol-1 |
| 1s2 2s2p6 3s2p6d10 4s2p3 |
| 2, 8, 18, 5 |
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Physical properties of Arsenic |
| solid |
| 5.727 g·cm-3 |
| 1090(K),
817°C, 1503 °F |
| 887(K),
617°C, 1137 °F |
| ? |
| 1673(K), MPa |
| (grey) 24.44 kJ·mol-1 |
| 34.76 kJ·mol-1 |
| 24.64 J·mol-1·K-1 |
| 2.18 (Pauling scale) |
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Atomic structure of Arsenic |
| 1.33 Å |
| 13.1 cm³/mol |
| 1.2 Å |
| 4.3 |
| Rhombohedral |
| 46 (+5e) 222 (-3e) |
| 4p3 |
| 33 |
| 42 |
| 33 |
| -3, 3, 5 |
| 4s2p3 |
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Electron dot
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Other languages |
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| Latin: |
Arsenicum |
| Czech: |
Arzen |
| Croatian: |
Arsen |
| French: |
Arsenic |
| German: |
Arsenic - r |
| Italian: |
Arsenico |
| Norwegian: |
Arsen |
| Portuguese: |
Arsênio |
| Spanish: |
Arsénico |
| Swedish: |
Arsenik |
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| Element |
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Brief description |
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Arsenic has a valence of -3, 0, +3, or +5. The elemental solid primarily occurs in two modifications, though other allotropes are reported. Yellow arsenic has a specific gravity of 1.97, while gray or metallic arsenic has a specific gravity of 5.73. Gray arsenic is the usual stable form, with a melting point of 817°C (28 atm) and sublimation point at 613°C. Gray arsenic is a very brittle semi-metallic solid. It is steel-gray in color, crystalline, tarnishes readily in air, and is rapidly oxidized to arsenous oxide (As2O3) upon heating (arsenous oxide exudes the odor of garlic). Arsenic and its compounds are poisonous.
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Uses of Arsenic |
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Arsenic is used as a doping agent in solid-state devices. Gallium arsenide is used in lasers which convert electricity into coherent light. Arsenic is used pyrotechny, hardening and improving the sphericity of shot, and in bronzing. Arsenic compounds are used as insecticides and in other poisons.
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Hystory of Arsenic |
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- Discoverer: August Arfvedson
- Discovery Location: Sweden
- Discovery Year: 1817
- Name Origin: Greek: lithos, stone
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