మూస:టెక్నీషియం మూలకం

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టెక్నీషియం, 00Tc
టెక్నీషియం
Pronunciation/tɛkˈnʃ(i)əm/ (tek-NEE-sh(ee-)əm)
Appearanceshiny gray metal
Mass number[97]
టెక్నీషియం in the periodic table
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 Iron Cobalt Nickel 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
Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead 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
మాలిబ్డెనంటెక్నీషియంరుథీనియం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 5
Block  d-block
Electron configuration[Kr] 4d5 5s2
Electrons per shell2, 8, 18, 13, 2
Physical properties
Phase at STPsolid
Melting point2430 K ​(2157 °C, ​3915 °F)
Boiling point4538 K ​(4265 °C, ​7709 °F)
Density (near r.t.)11 g/cm3
Heat of fusion33.29 kJ/mol
Heat of vaporization585.2 kJ/mol
Molar heat capacity24.27 J/(mol·K)
Vapor 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−1, 0, +1,[1] +2, +3,[1] +4, +5, +6, +7 (a strongly acidic oxide)
ElectronegativityPauling scale: 1.9
Atomic radiusempirical: 136 pm
Covalent radius147±7 pm
Color lines in a spectral range
Spectral lines of టెక్నీషియం
Other properties
Natural occurrencefrom decay
Crystal structurehexagonal close-packed (hcp)
Hexagonal close packed crystal structure for టెక్నీషియం
Speed of sound thin rod16,200 m/s (at 20 °C)
Thermal conductivity50.6 W/(m⋅K)
Magnetic orderingParamagnetic
CAS Number7440-26-8
History
PredictionDmitri Mendeleev (1871)
DiscoveryCarlo Perrier and Emilio Segrè (1937)
First isolationCarlo Perrier and Emilio Segrè (1937)
Isotopes of టెక్నీషియం
Template:infobox టెక్నీషియం isotopes does not exist
 Category: టెక్నీషియం
| references

References

  1. 1.0 1.1 "Technetium: technetium(III) iodide compound data". OpenMOPAC.net. Retrieved 2007-12-10.
  2. "Technetium: technetium(III) iodide compound data". OpenMOPAC.net. Retrieved 2007-12-10.
  3. "Technetium: technetium(I) fluoride compound data". OpenMOPAC.net. Retrieved 2007-12-10.