మూస:Infobox tantalum

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టాంటలం, 00Ta
టాంటలం
Pronunciation/ˈtæntələm/ (TAN-təl-əm)
Appearancegray blue
Standard atomic weight Ar°(Ta)
టాంటలం 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
Nb

Ta

Db
హాఫ్నియంటాంటలంటంగ్‌స్టన్
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 6
Block  d-block
Electron configuration[Xe] 4f14 5d3 6s2
Electrons per shell2, 8, 18, 32, 11, 2
Physical properties
Phase at STPsolid
Melting point3290 K ​(3017 °C, ​5463 °F)
Boiling point5731 K ​(5458 °C, ​9856 °F)
Density (near r.t.)16.69 g/cm3
when liquid (at m.p.)15 g/cm3
Heat of fusion36.57 kJ/mol
Heat of vaporization732.8 kJ/mol
Molar heat capacity25.36 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 3297 3597 3957 4395 4939 5634
Atomic properties
Oxidation states−3, −1, 0, +1, +2, +3, +4, +5 (a mildly acidic oxide)
ElectronegativityPauling scale: 1.5
Atomic radiusempirical: 146 pm
Covalent radius170±8 pm
Color lines in a spectral range
Spectral lines of టాంటలం
Other properties
Natural occurrenceprimordial
Crystal structurebody-centered cubic (bcc)[3]
Body-centered cubic crystal structure for టాంటలం

α-Ta
Speed of sound thin rod3400 m/s (at 20 °C)
Thermal expansion6.3 µm/(m⋅K) (at 25 °C)
Thermal conductivity57.5 W/(m⋅K)
Electrical resistivity131 n Ω⋅m (at 20 °C)
Magnetic orderingparamagnetic[4]
Young's modulus186 GPa
Shear modulus69 GPa
Bulk modulus200 GPa
Poisson ratio0.34
Mohs hardness6.5
Vickers hardness873 MPa
Brinell hardness800 MPa
CAS Number7440-25-7
History
Discoveryఆండర్స్ గుస్టాఫ్ ఎకెబెర్గ్ (1802)
ఒక మూలకంగా గుర్తించినదిహీన్రిచ్ రోస్ (1844)
Isotopes of టాంటలం
Template:infobox టాంటలం isotopes does not exist
 Category: టాంటలం
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References

  1. "Standard Atomic Weights: Tantalum". CIAAW. 2005.
  2. Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
  3. 3.0 3.1 doi:10.1107/S0567740873004140
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  4. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.