Template:Infobox technetium

Technetium, 43Tc
Technetium
Pronunciation/tɛkˈnʃiəm/ (tek-NEE-shee-əm)
Mass number[97]
Technetium in the periodic cairt
Hydrogen Helium
Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon
Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon
Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton
Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) Cadmium Indium Tin Antimony Tellurium Iodine Xenon
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gowd Mercur (element) Thallium Leid (element) Bismuth Polonium Astatine Radon
Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium
Mn

Tc

Re
molybdenumtechnetiumruthenium
Atomic nummer (Z)43
Groupgroup 7
Periodperiod 5
Blockd-block
Element category  Transeetion metal
Electron confeeguration[Kr] 4d5 5s2
Electrons per shell2, 8, 18, 13, 2
Pheesical properties
Phase at STPsolit
Meltin pynt2430 K ​(2157 °C, ​3915 °F)
Bylin pynt4538 K ​(4265 °C, ​7709 °F)
Density (near r.t.)11 g/cm3
Heat o fusion33.29 kJ/mol
Heat o vapourisation585.2 kJ/mol
Molar heat capacity24.27 J/(mol·K)
Vapour pressur (extrapolatit)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 2727 2998 3324 3726 4234 4894
Atomic properties
Oxidation states−3, −1, 0, +1,[1] +2, +3,[1] +4, +5, +6, +7 strangly acidic
ElectronegativityPauling scale: 1.9
Atomic radiusempirical: 136 pm
Covalent radius147±7 pm
Colour lines in a spectral range
Colour lines in a spectral range
Spectral lines o technetium
Ither properties
Creestal structurhexagonal close-packed (hcp)
Hexagonal close packed creestal structur for technetium
Speed o soond thin rod16,200 m/s (at 20 °C)
Thermal conductivity50.6 W/(m·K)
Magnetic orderinParamagnetic
CAS Nummer7440-26-8
History
PredictionDmitri Mendeleev (1871)
DiskiveryCarlo Perrier an Emilio Segrè (1937)
First isolationCarlo Perrier an Emilio Segrè (1937)
Main isotopes o technetium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 95mTc syn 61 d ε 95Mo
γ -
IT 95Tc
96Tc syn 4.3 d ε 96Mo
γ -
97Tc syn 2.6×106 y ε 97Mo
97mTc syn 91 d IT 97Tc
98Tc syn 4.2×106 y β 98Ru
γ -
99Tc trace 2.111×105 y β 99Ru
99mTc syn 6.01 h IT 99Tc
γ -
| references
style="text-align:left"|
in calc from C diff report ref
C 2157
K 2430 2430 0
F 3915 3915 0
WD 2170 Celsius Edit this at Wikidata
input C: 2157, K: 2430, F: 3915
comment
style="text-align:left"|
in calc from C diff report ref
C 4265
K 4538 4538 0
F 7709 7709 0
WD Edit this at Wikidata
input C: 4265, K: 4538, F: 7709
comment

References

  1. a b "Technetium: technetium(III) iodide compound data". OpenMOPAC.net. Retrieved 10 December 2007.
  2. "Technetium: technetium(III) iodide compound data". OpenMOPAC.net. Retrieved 10 December 2007.
  3. "Technetium: technetium(I) fluoride compound data". OpenMOPAC.net. Retrieved 10 December 2007.