टेलुरियम
52
Te
समूह
16
आवर्त
5
ब्लॉक
p
प्रोटॉन
इलेक्ट्रॉन्स
न्यूट्रॉन
52
52
76
सामान्य गुण
परमाणु संख्या
52
परमाणु भार
127.6
द्रव्यमान संख्या
128
श्रेणी
उपधातु
रंग
रजत
रेडियोधर्मी
नहीं
From the Latin word tellus, earth
क्रिस्टल की संरचना
सरल त्रिकोणीय
इतिहास
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.
इलेक्ट्रॉन प्रति शेल
2, 8, 18, 18, 6
इलेक्ट्रॉन कॉन्फिगरेशन
[Kr] 4d10 5s2 5p4
In air, tellurium burns with a greenish-blue flames, forming the dioxide
भौतिक गुण
अवस्था
ठोस
घनत्व
6.232 g/cm3
गलनांक
722.66 K | 449.51 °C | 841.12 °F
क्वथनांक
1261.15 K | 988 °C | 1810.4 °F
विलय ऊष्मा
17.5 कि.जूल/मोल
वाष्पीकरण ऊष्मा
48 कि.जूल/मोल
विशिष्ट ऊष्मा क्षमता
0.202 जूल/ग्राम•केल्विन
पृथ्वी की पपड़ी में प्रचुरता
9.9×10-8%
ब्रह्मांड में प्रचुरता
9×10-7%
सी ए एस संख्या
13494-80-9
PubChem सी.आई.डी. संख्या
6327182
परमाण्विक गुण
परमाणु का त्रिज्या
140 pm
संयोजी त्रिज्या
138 pm
इलेक्ट्रोनेगेटिविटी
2.1 (पाइलिंग पैमाना)
आयनीकरण ऊर्जाएं
9.0096 eV
परमाणु आयतन
20.5 से.मी.३/मोल
तापीय चालकता
0.0235 W/cm·K
ऑक्सीकरण स्थितियां
-2, 2, 4, 5, 6
उपयोग
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
समस्थानिक
स्थिर आइसोटोप
120Te, 122Te, 124Te, 125Te, 126Teअस्थिर समस्थानिक
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