Arsen
33
As
Grupă
15
Perioadă
4
Bloc
p
Protoni
Electroni
Neutroni
33
33
42
Proprietăți Generale
Număr atomic
33
Masă atomică
74,9216
Numar de masa
75
Categorie
Metaloid
Culoare
Argint
Radioactive
Nu
Din cuvântul latin arsenicum, greacă arsenikon
Structură cristalină
Simplu Trigonal
Istoric
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.
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.
Electroni pe nivelul de energie
2, 8, 18, 5
Configurație electronică
[Ar] 3d10 4s2 4p3
Prawns are known to contain quite high levels of arsenic
Proprietăți Fizice
Fază
Solid
Densitate
5,776 g/cm3
Punct de topire
1090,15 K | 817 °C | 1502,6 °F
Punct de fierbere
876,15 K | 603 °C | 1117,4 °F
Energie de fuziune
27,7 kJ/mol
Energie de evaporare
32,4 kJ/mol
Căldură specifică
0,329 J/g·K
Abundența în scoarța Pământului
0,00021%
Abundența în Univers
8×10-7%
Numarul CAS
7440-38-2
Număr CID PubChem
5359596
Proprietăți Atomice
Rază atomică
119 pm
Rază de covalență
119 pm
Electronegativitate
2,18 (Scara lui Pauling)
Potențial de ionizare
9,7886 eV
Volum molar
12,97 cm3/mol
Conductivitate termică
0,502 W/cm·K
Număr de oxidare
-3, 2, 3, 5
Aplicații
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 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
Izotopi
Izotopi stabili
75AsIzotopi instabili
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