మూస:Infobox protactinium

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ప్రొటాక్టీనియం, 00Pa
ప్రొటాక్టీనియం
Pronunciation/ˌprtækˈtɪniəm/ (PROH-tak-TIN-ee-əm)
Appearancebright, silvery metallic luster
Standard atomic weight Ar°(Pa)
ప్రొటాక్టీనియం 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
Pr

Pa

(Uqt)
థోరియంప్రొటాక్టీనియంయురేనియం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 7
Block  f-block
Electron configuration[Rn] 5f2 6d1 7s2
Electrons per shell2, 8, 18, 32, 20, 9, 2
Physical properties
Phase at STPsolid
Melting point1841 K ​(1568 °C, ​2854 °F)
Boiling point? 4300 K ​(? 4027 °C, ​? 7280 °F)
Density (near r.t.)15.37 g/cm3
Heat of fusion12.34 kJ/mol
Heat of vaporization481 kJ/mol
Atomic properties
Oxidation states+2, +3, +4, +5 (a weakly basic oxide)
ElectronegativityPauling scale: 1.5
Atomic radiusempirical: 163 pm
Covalent radius200 pm
Color lines in a spectral range
Spectral lines of ప్రొటాక్టీనియం
Other properties
Natural occurrencefrom decay
Crystal structuretetragonal[3]
Tetragonal crystal structure for ప్రొటాక్టీనియం
Thermal conductivity47 W/(m⋅K)
Electrical resistivity177 n Ω⋅m (at 0 °C)
Magnetic orderingparamagnetic[4]
CAS Number7440-13-3
History
PredictionDmitri Mendeleev (1869)
DiscoveryWilliam Crookes (1900)
First isolationWilliam Crookes (1900)
Named byOtto Hahn and Lise Meitner (1917–8)
Isotopes of ప్రొటాక్టీనియం
Template:infobox ప్రొటాక్టీనియం isotopes does not exist
 Category: ప్రొటాక్టీనియం
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References

  1. "Standard Atomic Weights: Protactinium". CIAAW. 2017.
  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. Donohue, J. (1959). "On the crystal structure of protactinium metal". Acta Crystallographica. 12 (9): 697. doi:10.1107/S0365110X59002031.
  4. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.