ଟେକ୍ନିସିଅମ

ଟେକ୍ନିସିଅମ ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Tc ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୪୩ ।

Technetium,  ₄₃Tc

ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	technetium, Tc
Appearance	shiny gray metal
ଉଚ୍ଚାରଣ	/tɛkˈniːʃiəm/ tek-NEE-shee-əm
Technetium in the periodic table
Mn ↑ Tc ↓ Re molybdenum ← technetium → ruthenium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	43
ଶ୍ରେଣୀ, ବ୍ଳକ	group 7, d-block
ପର୍ଯ୍ୟାୟ	period 5
ମୌଳିକ ପ୍ରକାର	transition metal
ମାନକ ପରମାଣବିକ ଓଜନ (Ar)	[98]
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Kr] 4d5 5s2
per shell	2, 8, 18, 13, 2
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	solid
ଗଳନାଙ୍କ	2430 K ​(2157 °C, ​3915 °F)
ସ୍ଫୁଟନାଙ୍କ	4538 K ​(4265 °C, ​7709 °F)
Density near r.t.	11 g/cm3
Heat of fusion	33.29 kJ/mol
Heat of	585.2 kJ/mol
Molar heat capacity	24.27 J/(mol·K)
pressure (extrapolated) P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 2727 2998 3324 3726 4234 4894
Atomic properties
Oxidation states	7, 6, 5, 4, 3, 2, 1, -1, -3 ​strongly acidic oxide
Electronegativity	Pauling scale: 1.9
Atomic radius	empirical: 136 pm
Covalent radius	147±7 pm
Miscellanea
Crystal structure	​hexagonal close-packed (hcp)
Speed of sound thin rod	16,200 m/s (at 20 °C)
Thermal conductivity	50.6 W/(m·K)
Magnetic ordering	Paramagnetic
CAS Number	7440-26-8
ଇତିହାସ
Prediction	Dmitri Mendeleev (1871)
ଆବିଷ୍କାର	Carlo Perrier and Emilio Segrè (1937)
First isolation	Carlo Perrier and Emilio Segrè (1937)
Most stable isotopes of technetium
iso NA half-life DM DE (MeV) DP 95mTc syn 61 d ε - 95Mo γ 0.204, 0.582, 0.835 - IT 0.0389, e 95Tc 96Tc syn 4.3 d ε - 96Mo γ 0.778, 0.849, 0.812 - 97Tc syn 2.6×106 y ε - 97Mo 97mTc syn 91 d IT 0.965, e 97Tc 98Tc syn 4.2×106 y β− 0.4 98Ru γ 0.745, 0.652 - 99Tc trace 2.111×105 y β− 0.294 99Ru 99mTc syn 6.01 h IT 0.142, 0.002 99Tc γ 0.140 -

ସହାୟକ ଗ୍ରନ୍ଥ

• Cotton, F. A.; Wilkinson, G.; Murillo, C. A.; Bochmann, M. (1999). Advanced Inorganic Chemistry (6th ed.). New York: John Wiley & Sons, Inc. ISBN 0-471-19957-5.{{cite book}}: CS1 maint: multiple names: authors list (link)
• Emsley, J. (2001). Nature's Building Blocks: An A-Z Guide to the Elements. Oxford, England, UK: Oxford University Press. ISBN 0-19-850340-7.{{cite book}}: CS1 maint: ref duplicates default (link)
• Greenwood, N. N.; Earnshaw, A. (1997). Chemistry of the Elements (2nd ed.). Oxford: Butterworth-Heinemann. ISBN 0-7506-3365-4.
• Heiserman, D. L. (1992). "Element 43: Technetium". Exploring Chemical Elements and their Compounds. New York: TAB Books. ISBN 0-8306-3018-X.{{cite book}}: CS1 maint: ref duplicates default (link)
• Schwochau, K. (2000). Technetium: chemistry and radiopharmaceutical applications. Wiley-VCH. ISBN 3-527-29496-1.

ଆହୁରି ପଢନ୍ତୁ

• B.J. Wilson, ed. (1966). The radiochemical Manual (2nd ed.). ISBN 0-7058-1768-7.
• Scerri, E.R. (2007). The Periodic Table, Its Story and Its Significance. Oxford University Press,. ISBN 0-19-530573-6.{{cite book}}: CS1 maint: extra punctuation (link)
• Choppin, G.; Liljenzin, J-O; Rydberg, J. (2002). "Nuclear Mass and Stability". Radiochemistry and nuclear chemistry (3rd ed.). Butterworth-Heinemann. pp. 41–57. ISBN 978-0-7506-7463-8.
• WebElements.com – Technetium, and EnvironmentalChemistry.com – Technetium
• Nudat 2 Archived 2021-04-28 at the Wayback Machine. nuclide chart from the National Nuclear Data Center, Brookhaven National Laboratory
• Nuclides and Isotopes Archived 2011-02-02 at the Wayback Machine. Fourteenth Edition: Chart of the Nuclides, General Electric Company, 1989
• Chemistry in its element podcast (MP3) from the Royal Society of Chemistry's Chemistry World: Technetium

ବାହାର ଲିଙ୍କ

• Technetium at The Periodic Table of Videos (University of Nottingham)