Arsen

33
As
Gruppe
15
Periode
4
Blokk
p
Protons
Electrons
Neutrons
33
33
42
Generelle eigenskapar
Atomnummer
33
Atommasse
74,9216
Mass Number
75
Kategori
Halvmetall
Farge
Silver
Radioactive
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.
Elektron per energinivå
2, 8, 18, 5
Elektronkonfigurasjon
[Ar] 3d10 4s2 4p3
As
Prawns are known to contain quite high levels of arsenic
Fysiske eigenskapar
Tilstandsform
Fast stoff
Tettleik
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
Fordampingsvarme
32,4 kJ/mol
Spesifikk varmekapasitet
0,329 J/g·K
Abundance in Earth's crust
0,00021%
Abundance in Universe
8×10-7%
Ultrapure
Image Credits: Images-of-elements
Ultrapure metallic arsenic under argon
CAS Number
7440-38-2
PubChem CID Number
5359596
Atom eigenskapar
Atomradius
119 pm
Kovalent radius
119 pm
Elektronegativitet
2,18 (Paulings skala)
Ioniseringspotensial
9,7886 eV
Molart volum
12,97 cm3/mol
Termisk konduktivitet
0,502 W/cm·K
Oksidasjonstrinn
-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
Isotopes
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