American Elements
   
Technetium
Technetium information, including Technical Data, Safety Data and its high purity properties, research, applications and other useful facts are discussed below. Scientific facts such as the atomic structure, ionization energy, abundance on Earth, conductivity and thermal properties are included.

  Hydrogen                                 Helium
  Lithium Beryllium                     Boron Carbon Nitrogen Oxygen Fluorine Neon
  Sodium Magnesium                     Aluminum Silicon Phosphorus Sulfur Chlorine Argon
  Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Hydrogen Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
  Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon
  Cesium Barium Cerium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury Thallium Lead Bismuth Polonium Astatine Radon
  Francium Radium Actinium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Ununquadium Ununpentium Ununhexium Ununseptium Ununoctium
                                     
      Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium    
      Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawerencium    


(click on an element)

Technetium Bohr ModelTechnetium is a Block D, Group 7, Period 5 element. The number of electrons in each of Technetium's shells is 2, 8, 18, 13, 2 and its electronic configuration is [Kr] 4d5 5s2. In its elemental form Technetium's CAS number is 7440-26-8. The Technetium atom has a radius of 135.2.pm and it's Van der Waals radius is 200.pm.

Technetium was discovered by Carlo Perrier and Emilio Segre in 1937. Technetium was the first element to be made artificially. This is indicated by its name which originates from the greek word "technetos" meaning artificial.



Frenchtechnétium German Technetium Italian tecneto PortugueseTecnécio Spanish tecnecio Swedish Teknetium


Technetium Abundance. The following table shows the abundance of Technetium and each of its naturally occurring isotopes on Earth along with the atomic mass for each isotope.
Isotope Atomic Mass % Abundance on Earth
Tc-98 97.907216 -
Tc-99 98.906255 -


Technetium Safety Data. The safety data for Technetium metal, nanoparticles and its compounds can vary widely depending on the form. For potential hazard information, toxicity, and road, sea and air transportation limitations, such as DOT Hazard Class, DOT Number, EU Number, NFPA Health rating and RTECS Class, please see the specific material or compound referenced in the left margin. Technetium compounds have no biological role.

Ionization Energy. The ionization energy for Technetium (the least required energy to release a single electron from the atom in it's ground state in the gas phase) is stated in the following table:
1st Ionization Energy 702.42 kJ mol-1
2nd Ionization Energy 702.42 kJ mol-1
3rd Ionization Energy 2850.20 kJ mol-1


Conductivity. As to Technetium's electrical and thermal conductivity, the electrical conductivity measured in terms of electrical resistivity @ 20 ºC is 16.9 µOcm and its electronegativities (or its ability to draw electrons relative to other elements) is 2.1. The thermal conductivity of Technetium is 50.6 W m-1 K-1.

Thermal Properties of Technetium. The melting point and boiling point for Technetium are stated below. The following chart sets forth the heat of fusion, heat of vaporization and heat of atomization.
Heat of Fusion 23.81 kJ mol-1
Heat of Vaporization 585.22 kJ mol-1
Heat of Atomization 678 kJ mol-1


Recent Research & Development for Technetium
  • In vitro and in vivo targeted delivery of photosensitizers to the tumor cells for enhanced photodynamic effects. Gupta S, Dwarakanath BS, Chaudhury NK, Mishra AK, Muralidhar K, Jain V. J Cancer Res Ther. 2011 Jul;7(3):314-24. PMID: 22044814 [PubMed - in process]

  • In Vivo SPECT Reporter Gene Imaging of Regulatory T Cells. Sharif-Paghaleh E, Sunassee K, Tavaré R, Ratnasothy K, Koers A, Ali N, Alhabbab R, Blower PJ, Lechler RI, Smyth LA, Mullen GE, Lombardi G. PLoS One. 2011;6(10):e25857. Epub 2011 Oct 17. PMID: 22043296 [PubMed - in process]

  • Acetazolamide-challenged perfusion magnetic resonance imaging for assessment of cerebrovascular reserve capacity in patients with symptomatic middle cerebral artery stenosis: comparison with technetium-99m-hexamethylpropyleneamine oxime single-photon emission computed tomography. Kim HJ, Kim TW, Ryu SY, Yang PS, Kwon MJ, Kim JC, Lee YS, Lee HJ, Yang JH, Kim JK, Chung YA, Oh EY, Lee SB. Clin Imaging. 2011 Nov;35(6):413-20. PMID: 22040783 [PubMed - in process]

  • Correction of liver displacement due to irregular respiration for SPECT images obtained using a multiple short-time acquisition with breath-holding technique. Ueda Y, Kudomi S, Koike M, Oishi Y, Iwanaga H, Ueda K. Radiol Phys Technol. 2011 Oct 27. [Epub ahead of print] PMID: 22038313 [PubMed - as supplied by publisher]

  • Long-distance transport of pertechnetate in the moonflower (Ipomoea alba). Clarke SJ, Rogiers SY, Currie GM. J Environ Radioact. 2012 Jan;103(1):54-8. Epub 2011 Sep 25. PMID: 22036159 [PubMed - in process]

  • Decorporation and Therapeutic Efficacy of Liposomal-DTPA Against Thorium Induced Toxicity in the Wistar Rat. Kumar A, Sharma P, Ali M, Pandey BN, Mishra KP. Int J Radiat Biol. 2011 Oct 31. [Epub ahead of print] PMID: 22035501 [PubMed - as supplied by publisher]

  • Systemic lupus erythematosus complicated with protein-losing enteropathy: A case report and review of the published works. Awazawa R, Yamamoto YI, Mine Y, Nakamura I, Kishimoto K, Kinjyo F, Hagiwara K, Fujita J, Uezato H, Takahashi K. J Dermatol. 2011 Oct 31. doi: 10.1111/j.1346-8138.2011.01404.x. [Epub ahead of print] PMID: 22035257 [PubMed - as supplied by publisher]

  • Pretreatment With Citrulline Improves Gut Barrier After Intestinal Obstruction in Mice. Batista MA, Nicoli JR, Dos Santos Martins F, Nogueira Machado JA, Esteves Arantes RM, Pacífico Quirino IE, Davisson Correia MI, Cardoso VN. JPEN J Parenter Enteral Nutr. 2011 Oct 21. [Epub ahead of print] PMID: 22020808 [PubMed - as supplied by publisher]

  • Nephromegaly is a Significant Risk Factor for Renal Scarring in Children With First Febrile Urinary Tract Infections. Cheng CH, Hang JF, Tsau YK, Lin TY. J Urol. 2011 Oct 21. [Epub ahead of print] PMID: 22019042 [PubMed - as supplied by publisher]

  • Renal scintigraphy predicts global cardiovascular risk in hypertensive subjects with normal serum creatinine levels. Mazza A, Rampin L, Montemurro D, Schiavon L, Zuin M, Grassetto G, Chondrogiannis S, Al-Nahhas A, Ramazzina E, Rubello D. Blood Press. 2011 Oct 24. [Epub ahead of print] PMID: 22017389 [PubMed - as supplied by publisher]

  • Blood Flow to the Extensor Carpi Radialis Brevis Muscle Following Adrenaline Infusion in Patients With Lateral Epicondylitis. Vedung T, Werner M, Ljung BO, Jorfeldt L, Henriksson J. J Hand Surg Am. 2011 Oct 18. [Epub ahead of print] PMID: 22015074 [PubMed - as supplied by publisher]

  • Improved transnasal transport and brain uptake of tizanidine HCl-loaded thiolated chitosan nanoparticles for alleviation of pain. Patel D, Naik S, Misra A. J Pharm Sci. 2011 Oct 17. doi: 10.1002/jps.22780. [Epub ahead of print] PMID: 22006260 [PubMed - as supplied by publisher]

  • Single-Photon-Emission Computed Tomography (SPECT) with Technetium-99m Sestamibi in the Diagnosis of Small Breast Cancer and Axillary Lymph Node Involvement. de Cesare A, Vincentis Giuseppe D, Stefano G, Giacomo C, Enrico F, Marco B, Crocetti A, Sterpetti AV. World J Surg. 2011 Oct 15. [Epub ahead of print] PMID: 22002494 [PubMed - as supplied by publisher]

  • Efficacy of US-guided Percutaneous Cholecystocholangiography for the Early Exclusion and Type Determination of Biliary Atresia. Lee SY, Kim GC, Choe BH, Ryeom HK, Jang YJ, Kim HJ, Park JY, Cho SM. Radiology. 2011 Oct 13. [Epub ahead of print] PMID: 21998045 [PubMed - as supplied by publisher]

  • Effects of Previous Surgery on the Detection of Sentinel Nodes in Women With Vulvar Cancer. Ennik TA, Allen DG, Bekkers RL, Hyde SE, Grant PT. Int J Gynecol Cancer. 2011 Oct 8. [Epub ahead of print] PMID: 21997173 [PubMed - as supplied by publisher]

  • Comparisons of Technetium-99m Diethylenetriaminepentaacetic Acid Plasma Clearance and Renal Dynamic Imaging With Inulin Clearance. Chen LI, Kuo MC, Hwang SJ, Chen YW, Wu KD, Chen HC. Am J Kidney Dis. 2011 Oct 12. [Epub ahead of print] No abstract available. PMID: 21995969 [PubMed - as supplied by publisher]

  • Time-Course Analysis of Brain Perfusion Single Photon Emission Computed Tomography Using a Three-Dimensional Stereotactic Region-of-Interest Template in Patients with Moyamoya Disease. Marushima A, Tsurushima H, Suzuki K, Nakai Y, Nemoto H, Matsumura A. World Neurosurg. 2011 Sep;76(3-4):304-10. PMID: 21986429 [PubMed - in process]

  • Photoreduction of (99)Tc Pertechnetate by Nanometer-Sized Metal Oxides: New Strategies for Formation and Sequestration of Low-Valent Technetium. Burton-Pye BP, Radivojevic I, McGregor D, Mbomekalle IM, Lukens WW, Francesconi LC. J Am Chem Soc. 2011 Oct 31. [Epub ahead of print] PMID: 21985281 [PubMed - as supplied by publisher]

  • Contrast-enhanced ultrasonography for localization of pathologic glands in patients with primary hyperparathyroidism. Agha A, Hornung M, Rennert J, Uller W, Lighvani H, Schlitt HJ, Jung EM. Surgery. 2011 Oct 6. [Epub ahead of print] PMID: 21982525 [PubMed - as supplied by publisher]

  • fac-[TcO(3) (tacn)](+) : A Versatile Precursor for the Labelling of Pharmacophores, Amino Acids and Carbohydrates through a New Ligand-Centred Labelling Strategy. Braband H, Tooyama Y, Fox T, Simms R, Forbes J, Valliant JF, Alberto R. Chemistry. 2011 Nov 11;17(46):12967-74. doi: 10.1002/chem.201101275. Epub 2011 Oct 4. PMID: 21971703 [PubMed - in process]





  •  
    Formula Atomic Number Molecular Weight Electronegativity (Pauling) Density Melting Point Boiling Point Vanderwaals radius Ionic radius Energy of first ionization
    Tc 43 [98](0) g.mol -1 2.1 11 g·cm−3 2157  °C 4265 °C .200 nm - pm 702.42  kJ.mol-1

    PRODUCT CATALOG U.S. Operations News Submicron & Nanopowder Tolling Ultra High Purity Sputtering Target Crystal Growth Rod, Plate, Powder, etc. Foil Home



    German   Korean   French   Japanese   Spanish   Chinese (Simplified)   Portuguese   Russian   Chinese (Taiwan)   Italian   Turkish   Polish   Dutch   Czech   Swedish   Hungarian   Danish   Hebrew

    Production Catalog Available in 36 Countries & Languages

      Print this Page Twitter
    Periodic table of the elements science and academic information, elements and advanced materials data, scientific presentations and all pages, designs, concepts, logos, and color schemes herein are the copyrighted proprietary rights and intellectual property of American Elements. American Elements is a U.S. Registered Trademark. © 2001-2012. American Elements. All rights reserved.
    Learn Six Sigma


    American Elements is a copyrighted U.S. Trademark. All rights reserved.