Teluro
52
Te
Grupo
16
Perio
5
Bloko
p
Protonoj
Elektronoj
Neŭtronoj
52
52
76
Ĝeneralaj Propraĵoj
Atoma Nombro
52
Atommaso
127,6
Amasa Nombro
128
Kategorio
Metaloidoj
Koloro
Arĝento
Radioaktiva
Ne
From the Latin word tellus, earth
Kristala Strukturo
Simpla Trigono
Historio
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.
Elektronoj per ŝelo
2, 8, 18, 18, 6
Elektrona Agordo
[Kr] 4d10 5s2 5p4
In air, tellurium burns with a greenish-blue flames, forming the dioxide
Fizikaj Propraĵoj
Fazo
Solido
Denso
6,232 g/cm3
Fandpunkto
722,66 K | 449,51 °C | 841,12 °F
Bolpunkto
1261,15 K | 988 °C | 1810,4 °F
Varmo de Fuzio
17,5 kJ/mol
Varmo de Vaporiĝo
48 kJ/mol
Specifa Varmo Kapacito
0,202 J/g·K
Krusta Abundo
9,9×10-8%
Universa Abundo
9×10-7%
CAS Nombro
13494-80-9
PubChem Kunmetita Identiga Nombro
6327182
Atomaj Propraĵoj
Atoma Radiuso
140 pm
Kovalenta Radiuso
138 pm
Elektronegativeco
2,1 (Pauling-skalo)
Potencialo de jonigo
9,0096 eV
Atoma Volumo
20,5 cm3/mol
Termika Kondukto
0,0235 W/cm·K
Oksidaj Ŝtatoj
-2, 2, 4, 5, 6
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
120Te, 122Te, 124Te, 125Te, 126TeMalstabilaj Isotopoj
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