Telurium

52
Te
Golongan
16
Periode
5
Blok
p
Proton
Elektron
Neutron
52
52
76
Sifat Umum
Nomor atom
52
Massa atom
127,6
Nomor massa
128
Kategori
Metaloid
Warna
Perak
Radioaktif
Tidak
From the Latin word tellus, earth
Struktur kristal
Trigonal Sederhana
Sejarah
Tellurium was discovered in Transylvania in 1782 by Franz-Joseph Müller von Reichenstein in a mineral containing tellurium and gold.

In 1789, another Hungarian scientist, Pál Kitaibel, also discovered the element independently in an ore from Deutsch-Pilsen which had been regarded as argentiferous molybdenite.

In 1798, it was named by Martin Heinrich Klaproth who earlier isolated it from the mineral calaverite.
Elektron per kulit
2, 8, 18, 18, 6
Konfigurasi elektron
[Kr] 4d10 5s2 5p4
Te
In air, tellurium burns with a greenish-blue flames, forming the dioxide
Sifat Fisika
Fase
Solid
Kepadatan
6,232 g/cm3
Titik lebur
722,66 K | 449,51 °C | 841,12 °F
Titik didih
1261,15 K | 988 °C | 1810,4 °F
Kalor peleburan
17,5 kJ/mol
Kalor penguapan
48 kJ/mol
Kapasitas kalor molar
0,202 J/g·K
Kelimpahan di kerak bumi
9,9×10-8%
Kelimpahan di alam semesta
9×10-7%
Metallic
Kredit Gambar: Images-of-elements
Metallic tellurium
Nomor CAS
13494-80-9
PubChem CID Number
6327182
Sifat Atom
Jari-jari atom
140 pm
Jari-jari kovalen
138 pm
Elektronegativitas
2,1 (Skala Pauling)
Potensi Ionisasi
9,0096 eV
Volume atom
20,5 cm3/mol
Kondusivitas termal
0,0235 W/cm·K
Bilangan oksidasi
-2, 2, 4, 5, 6
Aplikasi
The primary use of tellurium is in alloys, foremost in steel and copper to improve machinability.

Tellurium is used as a basic ingredient in blasting caps, and is added to cast iron for chill control.

It is used in vulcanizing rubber and in catalysts for petroleum cracking.

Tellurium is used as a coloring agent in ceramics.
Tellurium and tellurium compounds are considered to be mildly toxic
Isotop
Isotop stabil
120Te, 122Te, 124Te, 125Te, 126Te
Isotop tidak stabil
105Te, 106Te, 107Te, 108Te, 109Te, 110Te, 111Te, 112Te, 113Te, 114Te, 115Te, 116Te, 117Te, 118Te, 119Te, 121Te, 123Te, 127Te, 128Te, 129Te, 130Te, 131Te, 132Te, 133Te, 134Te, 135Te, 136Te, 137Te, 138Te, 139Te, 140Te, 141Te, 142Te