Arzen

33
As
Skupina
15
Perioda
4
Blok
p
Protons
Electrons
Neutrons
33
33
42
General Properties
Vrstno število
33
Atomska teža
74,9216
Mass Number
75
Kategorija
Polkovine
Barva
Silver
Radioactive
Ne
From the Latin word arsenicum, Greek arsenikon
Kristalna struktura
Simple Trigonal
Zgodovina
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.
Electrons per shell
2, 8, 18, 5
Razporeditev elektronov
[Ar] 3d10 4s2 4p3
As
Prawns are known to contain quite high levels of arsenic
Physical Properties
Faza snovi
Trdnina
Gostota
5,776 g/cm3
Tališče
1090,15 K | 817 °C | 1502,6 °F
Vrelišče
876,15 K | 603 °C | 1117,4 °F
Talilna toplota
27,7 kJ/mol
Izparilna toplota
32,4 kJ/mol
Toplotna kapaciteta
0,329 J/g·K
Abundance in Earth's crust
0,00021%
Abundance in Universe
8×10-7%
Ultrapure
Zasluge za slike: Images-of-elements
Ultrapure metallic arsenic under argon
CAS Number
7440-38-2
PubChem CID Number
5359596
Atomic Properties
Atomski polmer
119 pm
Kovalentni polmer
119 pm
Elektronegativnost
2,18 (Paulingova lestvica)
Ionization Potential
9,7886 eV
Atomic Volume
12,97 cm3/mol
Toplotna prevodnost
0,502 W/cm·K
Oksidacijska stanja
-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