Tellur
52
Te
Guruh
16
Davr
5
Block
p
Protonlar
Elektronlar
Neytronlar
52
52
76
General Properties
Atom raqami
52
Atom massasi
127,6
Mass Number
128
Turkum
Yarim metallar
Ranggi
Silver
Radioaktivlik
Yoʻq
From the Latin word tellus, earth
Crystal Structure
Simple Trigonal
Tarix
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.
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.
Electrons per shell
2, 8, 18, 18, 6
Elektron konfiguratsiyasi
[Kr] 4d10 5s2 5p4
In air, tellurium burns with a greenish-blue flames, forming the dioxide
Physical Properties
Phase
Qattiq modda
Zichlik
6,232 g/cm3
Erish harorati
722,66 K | 449,51 °C | 841,12 °F
Qaynash harorati
1261,15 K | 988 °C | 1810,4 °F
Heat of Fusion
17,5 kJ/mol
Heat of Vaporization
48 kJ/mol
Solishtirma issiqlik sigʻimi
0,202 J/g·K
Abundance in Earth's crust
9,9×10-8%
Abundance in Universe
9×10-7%
CAS Number
13494-80-9
PubChem CID Number
6327182
Atomic Properties
Atom radiusi
140 pm
Kovalentlik radiusi
138 pm
Elektrmanfiylik
2,1 (Poling boʻyicha)
Ionization Potential
9,0096 eV
Molyar hajm
20,5 cm3/mol
Issiqlik oʻtkazuvchanlik
0,0235 W/cm·K
Oksidlanish darajasi
-2, 2, 4, 5, 6
Applications
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 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
Izotoplar
Barqaror izotoplar
120Te, 122Te, 124Te, 125Te, 126TeBeqaror izotoplar
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