Telluuri
52
Te
Ryhmä
16
Jakso
5
Lohko
p
Protonia
Elektronit
Neutronia
52
52
76
Yleiset ominaisuudet
Järjestysluku
52
Atomipaino
127,6
Massaluku
128
Luokka
Puolimetallit
Väri
Hopea
Radioaktiivisuus
Ei
From the Latin word tellus, earth
Kiderakenne
Yksinkertainen trigoninen
Historia
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.
Elektroneja elektronikuorilla
2, 8, 18, 18, 6
Orbitaalirakenne
[Kr] 4d10 5s2 5p4
In air, tellurium burns with a greenish-blue flames, forming the dioxide
Fyysiset ominaisuudet
Olomuoto
Kiinteä
Tiheys
6,232 g/cm3
Sulamispiste
722,66 K | 449,51 °C | 841,12 °F
Kiehumispiste
1261,15 K | 988 °C | 1810,4 °F
Sulamislämpö
17,5 kJ/mol
Höyrystymislämpö
48 kJ/mol
Ominaislämpökapasiteetti
0,202 J/g·K
Esiintyvyys maankuoressa
9,9×10-8%
Esiintyvyys maailmankaikkeudessa
9×10-7%
CAS-numero
13494-80-9
PubChem CID-numero
6327182
Atomiominaisuudet
Atomisäde
140 pm
Kovalenttisäde
138 pm
Elektronegatiivisuus
2,1 (Paulingin asteikko)
Ionisoitumispotentiaali
9,0096 eV
Moolitilavuus
20,5 cm3/mol
Lämmönjohtavuus
0,0235 W/cm·K
Hapetusluvut
-2, 2, 4, 5, 6
Käyttö
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
Isotooppi
Vakaat isotoopit
120Te, 122Te, 124Te, 125Te, 126TeEpävakaat isotoopit
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