Arsenic
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| Arsenic | |||||||||||||||||||||||||
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| General Info | |||||||||||||||||||||||||
| Atomic Symbol | As | ||||||||||||||||||||||||
| Atomic Number | 33 | ||||||||||||||||||||||||
| Atomic Weight | 74.9 g/mol74.9 amu | ||||||||||||||||||||||||
| Chemical series | metalloids | ||||||||||||||||||||||||
| Appearance | metallic gray | ||||||||||||||||||||||||
| Group, Period, Block | 15, 4, p | ||||||||||||||||||||||||
| Electron configuration | [Ar] 3d10 4s2 4p3 | ||||||||||||||||||||||||
| Electrons per shell | 2, 8, 18, 5 | ||||||||||||||||||||||||
| CAS number | [[CAS number::[7440-38-2]]] | ||||||||||||||||||||||||
| Physical properties | |||||||||||||||||||||||||
| Phase | solid | ||||||||||||||||||||||||
| Density | 5.727 g·cm−3 g/ml | ||||||||||||||||||||||||
| Melting point | 1090K816.85 °C 1,502.33 °F 1,962 °R | ||||||||||||||||||||||||
| Boiling point | subl. 887K613.85 °C 1,136.93 °F 1,596.6 °R | ||||||||||||||||||||||||
| Isotopes of Arsenic | |||||||||||||||||||||||||
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| All properties are for STP unless otherwise stated. | |||||||||||||||||||||||||
Contents |
Introduction
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Properties
Arsenic forms hygroscopic and acidic solutions which is colourless, crystalline oxides. Phosphorous also has same property as arsenic. Arsenic may work for phosphorous in biochemical reactions, because their acid have gaseous hydride which is unstable. They also have poisonous properties, but soluble arsenic compound was a medicine which is worke as stimulants in the middle of 18th century. When oxides are heated and it becomes arsenic trioxide, the vapor comes out but its smell is really bad.[1] Arsenide mineral, arsenopyrite, is detected in this vapor. Arsenic is contained in many solid forms. For examples, some forms are soft, waxy, and usstable.[2]
Occurrences
Almost 50% of white arsenic is produced in China. Peru and Chile are the secondary producer of white arsenic. White arsenic is important compound of arsenic. Paris Green, Calcium, and lead hydrogen arsenate are the latter three which are using for agricultural insecticides, and poisons and they are sulfide.[3]
Uses
Other
References
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