Arsen

33
As
Golongan
15
Periode
4
Blok
p
Proton
Elektron
Neutron
33
33
42
Sifat Umum
Nomor atom
33
Massa atom
74,9216
Nomor massa
75
Kategori
Metaloid
Warna
Perak
Radioaktif
Tidak
From the Latin word arsenicum, Greek arsenikon
Struktur kristal
Trigonal Sederhana
Sejarah
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 kulit
2, 8, 18, 5
Konfigurasi elektron
[Ar] 3d10 4s2 4p3
As
Prawns are known to contain quite high levels of arsenic
Sifat Fisika
Fase
Solid
Kepadatan
5,776 g/cm3
Titik lebur
1090,15 K | 817 °C | 1502,6 °F
Titik didih
876,15 K | 603 °C | 1117,4 °F
Kalor peleburan
27,7 kJ/mol
Kalor penguapan
32,4 kJ/mol
Kapasitas kalor molar
0,329 J/g·K
Kelimpahan di kerak bumi
0,00021%
Kelimpahan di alam semesta
8×10-7%
Ultrapure
Kredit Gambar: Images-of-elements
Ultrapure metallic arsenic under argon
Nomor CAS
7440-38-2
PubChem CID Number
5359596
Sifat Atom
Jari-jari atom
119 pm
Jari-jari kovalen
119 pm
Elektronegativitas
2,18 (Skala Pauling)
Potensi Ionisasi
9,7886 eV
Volume atom
12,97 cm3/mol
Kondusivitas termal
0,502 W/cm·K
Bilangan oksidasi
-3, 2, 3, 5
Aplikasi
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
Isotop
Isotop stabil
75As
Isotop tidak stabil
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