Arsen

33
As
Gruppe
15
Periode
4
Blok
p
Protons
Electrons
Neutrons
33
33
42
General Properties
Atomnummer
33
Atommasse
74,9216
Mass Number
75
Kategori
Halvmetaller
Farve
Silver
Radioactive
Nej
From the Latin word arsenicum, Greek arsenikon
Krystalstruktur
Simpel Trigonal
History
Greek historian Olympiodorus of Thebes roasted arsenic sulfide and obtained white arsenic during 5th century AD.

Albertus Magnus is believed to have been the first to isolate the element from a compound in 1250, by heating soap together with arsenic trisulfide.

In 1649, Johann Schröder published two ways of preparing arsenic.
Elektroner i hver skal
2, 8, 18, 5
Elektronkonfiguration
[Ar] 3d10 4s2 4p3
As
Prawns are known to contain quite high levels of arsenic
Physical Properties
Tilstandsform
Fast stof
Massefylde
5,776 g/cm3
Smeltepunkt
1090,15 K | 817 °C | 1502,6 °F
Kogepunkt
876,15 K | 603 °C | 1117,4 °F
Smeltevarme
27,7 kJ/mol
Fordampningsvarme
32,4 kJ/mol
Varmefylde
0,329 J/g·K
Abundance in Earth's crust
0,00021%
Abundance in Universe
8×10-7%
Ultrapure
Billede akkrediteringer: Images-of-elements
Ultrapure metallic arsenic under argon
CAS Number
7440-38-2
PubChem CID Number
5359596
Atomic Properties
Atomradius
119 pm
Kovalent radius
119 pm
Elektronegativitet
2,18 (Paulings skala)
Ionization Potential
9,7886 eV
Atomic Volume
12,97 cm3/mol
Varmeledningsevne
0,502 W/cm·K
Oxidationstrin
-3, 2, 3, 5
Applications
The toxicity of arsenic to insects, bacteria and fungi led to its use as a wood preservative and as insecticides.

Arsenic is used in bronzing, pyrotechny, and for hardening and improving the sphericity of shot.

Gallium arsenide is a semiconductor used in laser diodes and LEDs.

Small amounts of arsenic can be used in lead alloys for ammunition.
Arsenic and its compounds are poisonous
Isotoper
Stable Isotopes
75As
Unstable Isotopes
60As, 61As, 62As, 63As, 64As, 65As, 66As, 67As, 68As, 69As, 70As, 71As, 72As, 73As, 74As, 76As, 77As, 78As, 79As, 80As, 81As, 82As, 83As, 84As, 85As, 86As, 87As, 88As, 89As, 90As, 91As, 92As