మూస:Infobox actinium

ఆక్టీనియం, ₀₀Ac

ఆక్టీనియం
Pronunciation	/ækˈtɪniəm/ ​(ak-TIN-ee-əm)
Appearance	silvery-white, glowing with an eerie blue light
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) రేడియం ← ఆక్టీనియం → థోరియం
Group	మూస:Infobox element/symbol-to-group/format
Period	period 7
Block	f-block
Electron configuration	[Rn] 6d1 7s2
Electrons per shell	2, 8, 18, 32, 18, 9, 2
Physical properties
Phase at STP	solid
Melting point	(circa) 1323 K ​(1050 °C, ​1922 °F)
Boiling point	3471 K ​(3198 °C, ​5788 °F)
Density (near r.t.)	10 g/cm3
Heat of fusion	14 kJ/mol
Heat of vaporization	400 kJ/mol
Molar heat capacity	27.2 J/(mol·K)
Atomic properties
Oxidation states	+3 (a strongly basic oxide)
Electronegativity	Pauling scale: 1.1
Covalent radius	215 pm
Spectral lines of ఆక్టీనియం
Other properties
Natural occurrence	from decay
Crystal structure	​face-centered cubic (fcc)
Thermal conductivity	12 W/(m⋅K)
Magnetic ordering	no data
CAS Number	7440-34-8
History
Discovery	Friedrich Oskar Giesel (1902)
First isolation	Friedrich Oskar Giesel (1902)
Isotopes of ఆక్టీనియం

References

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