ఆక్టీనియం, 00Ac
ఆక్టీనియం
Pronunciation/ækˈtɪniəm/ (ak-TIN-ee-əm)
Appearancesilvery-white, glowing with an eerie blue light[1]
Mass number[227]
ఆక్టీనియం 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
La

Ac

(Uqu)
రేడియంఆక్టీనియంథోరియం
Groupమూస:Infobox element/symbol-to-group/format
Periodperiod 7
Block  f-block
Electron configuration[Rn] 6d1 7s2
Electrons per shell2, 8, 18, 32, 18, 9, 2
Physical properties
Phase at STPsolid
Melting point(circa) 1323 K ​(1050 °C, ​1922 °F)
Boiling point3471 K ​(3198 °C, ​5788 °F)
Density (near r.t.)10 g/cm3
Heat of fusion14 kJ/mol
Heat of vaporization400 kJ/mol
Molar heat capacity27.2 J/(mol·K)
Atomic properties
Oxidation states+3 (a strongly basic oxide)
ElectronegativityPauling scale: 1.1
Covalent radius215 pm
Color lines in a spectral range
Spectral lines of ఆక్టీనియం
Other properties
Natural occurrencefrom decay
Crystal structureface-centered cubic (fcc)
Face-centered cubic crystal structure for ఆక్టీనియం
Thermal conductivity12 W/(m⋅K)
Magnetic orderingno data
CAS Number7440-34-8
History
DiscoveryFriedrich Oskar Giesel (1902)
First isolationFriedrich Oskar Giesel (1902)
Isotopes of ఆక్టీనియం
Template:infobox ఆక్టీనియం isotopes does not exist
 Category: ఆక్టీనియం
| references

References

  1. Wall, Greg (8 September 2003). "C&EN: It's Elemental: The Periodic Table - Actinium". C&EN: It's Elemental: The Periodic Table. Chemical and Engineering News. Retrieved 2 June 2011.


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