Tellurium
52
Te
Groep
16
Periode
5
Blok
p
Protrone
Elektrone
Neutrone
52
52
76
Algemene Eienskappe
Atoom Nommer
52
Atoommassa
127,6
Massa Nommer
128
Kategorie
Metalloïdes
Kleur
Silver
Radioaktief
Nee
From the Latin word tellus, earth
Kristalstruktuur
Eenvoudige Trigonaal
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 18, 6
Elektronkonfigurasie
[Kr] 4d10 5s2 5p4
In air, tellurium burns with a greenish-blue flames, forming the dioxide
Fisiese Eienskappe
Fase
Soliede
Digtheid
6,232 g/cm3
Smeltpunt
722,66 K | 449,51 °C | 841,12 °F
Kookpunt
1261,15 K | 988 °C | 1810,4 °F
Heat of Fusion
17,5 kJ/mol
Heat of Vaporization
48 kJ/mol
Spesifieke Hitte Kapasiteit
0,202 J/g·K
Oorvloed in die aardkors
9,9×10-8%
Oorvloed in die heelal
9×10-7%
CAS Nommer
13494-80-9
PubChem CID Nommer
6327182
Atomiese Eienskappe
Atoom radius
140 pm
Kovalente Radius
138 pm
Elektronegatiewiteit
2,1 (Pauling scale)
Ionisasie potensiaal
9,0096 eV
Atoom volume
20,5 cm3/mol
Termiese geleidingsvermoë
0,0235 W/cm·K
Oksidasiestate
-2, 2, 4, 5, 6
Toepassings
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
Isotope
Stabiele Isotope
120Te, 122Te, 124Te, 125Te, 126TeOnstabiele Isotope
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