Arsen

33
As
Gruppe
15
Periode
4
Blokk
p
Protoner
Elektroner
Nøytroner
33
33
42
Generelle egenskaper
Atomnummer
33
Atomvekt
74,9216
Massetall
75
Kategori
Halvmetaller
Farge
Sølv
Radioaktiv
Nei
From the Latin word arsenicum, Greek arsenikon
Krystallstruktur
Simple Trigonal
Historie
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 per energinivå
2, 8, 18, 5
Elektronkonfigurasjon
[Ar] 3d10 4s2 4p3
As
Prawns are known to contain quite high levels of arsenic
Fysikalske egenskaper
Fase
Fast stoff
Tetthet
5,776 g/cm3
Smeltepunkt
1090,15 K | 817 °C | 1502,6 °F
Kokepunkt
876,15 K | 603 °C | 1117,4 °F
Smeltevarme
27,7 kJ/mol
Fordampningsvarme
32,4 kJ/mol
Spesifikk varmekapasitet
0,329 J/g·K
Forekomst i jordskorpa
0,00021%
Forekomst i universet
8×10-7%
Ultrapure
Bildekreditter: Images-of-elements
Ultrapure metallic arsenic under argon
CAS Number
7440-38-2
PubChem CID Number
5359596
Atomegenskaper
Atomradius
119 pm
Kovalent radius
119 pm
Elektronegativitet
2,18 (Pauling-skalaen)
Ioniseringsenergi
9,7886 eV
Molart volum
12,97 cm3/mol
Termisk ledningsevne
0,502 W/cm·K
Oksidasjonstilstander
-3, 2, 3, 5
Bruksområder
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
Stabile isotoper
75As
Ustabile isotoper
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