टेक्निशियम
43
Tc
समूह
7
आवर्त
5
ब्लॉक
d
प्रोटॉन
इलेक्ट्रॉन्स
न्यूट्रॉन
43
43
55
सामान्य गुण
परमाणु संख्या
43
परमाणु भार
[98]
द्रव्यमान संख्या
98
श्रेणी
संक्रमण धातु
रंग
रजत
रेडियोधर्मी
हाँ
From the Greek word technetos, artificial
क्रिस्टल की संरचना
सरल हेक्सागोनल
इतिहास
Element 43 was predicted on the basis of the periodic table, and was erroneously reported as having been discovered in 1925, at which time it was named masurium.
The element was actually discovered by Carlo Perrier and Emilio Segrè in 1937.
It was also found in a sample of molybdenum sent by Ernest Lawrence that was bombarded by deuterons in the Berkeley cyclotron.
The element was actually discovered by Carlo Perrier and Emilio Segrè in 1937.
It was also found in a sample of molybdenum sent by Ernest Lawrence that was bombarded by deuterons in the Berkeley cyclotron.
इलेक्ट्रॉन प्रति शेल
2, 8, 18, 13, 2
इलेक्ट्रॉन कॉन्फिगरेशन
[Kr] 4d5 5s2
Technetium was the first element to be produced artificially
भौतिक गुण
अवस्था
ठोस
घनत्व
11.5 g/cm3
गलनांक
2430.15 K | 2157 °C | 3914.6 °F
क्वथनांक
4538.15 K | 4265 °C | 7709 °F
विलय ऊष्मा
23 कि.जूल/मोल
वाष्पीकरण ऊष्मा
550 कि.जूल/मोल
विशिष्ट ऊष्मा क्षमता
-
पृथ्वी की पपड़ी में प्रचुरता
लागू नहीं
ब्रह्मांड में प्रचुरता
लागू नहीं
सी ए एस संख्या
7440-26-8
PubChem सी.आई.डी. संख्या
लागू नहीं
परमाण्विक गुण
परमाणु का त्रिज्या
136 pm
संयोजी त्रिज्या
147 pm
इलेक्ट्रोनेगेटिविटी
1.9 (पाइलिंग पैमाना)
आयनीकरण ऊर्जाएं
7.28 eV
परमाणु आयतन
8.5 से.मी.३/मोल
तापीय चालकता
0.506 W/cm·K
ऑक्सीकरण स्थितियां
-3, -1, 1, 2, 3, 4, 5, 6, 7
उपयोग
Technetium is used in nuclear medicine to carry out a number of medical tests, mainly relating to imaging and functional studies of internal bodily organs like bone scan.
It is also used industrially for equipment calibration following its approval as a standard beta emitter.
Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
It is also used industrially for equipment calibration following its approval as a standard beta emitter.
Mild carbon steels may be effectively protected by minute quantities of technetium, but this corrosion protection is limited to closed systems because of technetium's radioactivity.
Technetium is harmful due to its radioactivity
समस्थानिक
स्थिर आइसोटोप
-अस्थिर समस्थानिक
85Tc, 86Tc, 87Tc, 88Tc, 89Tc, 90Tc, 91Tc, 92Tc, 93Tc, 94Tc, 95Tc, 96Tc, 97Tc, 98Tc, 99Tc, 100Tc, 101Tc, 102Tc, 103Tc, 104Tc, 105Tc, 106Tc, 107Tc, 108Tc, 109Tc, 110Tc, 111Tc, 112Tc, 113Tc, 114Tc, 115Tc, 116Tc, 117Tc, 118Tc