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(Àtúnjúwe láti Actinium)
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Actinium, 89Ac
Actinium
Pípè /ækˈtɪniəm/ (ak-TIN-ee-əm)
Ìhànsójúsilvery
nọ́mbà ìsújọ[227]
Actinium ní orí tábìlì àyè
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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
La

Ac

Ute
radiumactiniumthorium
Nọ́mbà átọ̀mù (Z)89
Ẹgbẹ́group 3
Àyèàyè 7
Àdìpọ̀Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì  Actinide
Ìtò ẹ̀lẹ́ktrọ́nù[Rn] 6d1 7s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan2, 8, 18, 32, 18, 9, 2
Àwọn ohun ìní ara
Ìfarahàn at STPsolid
Ìgbà ìyọ́(circa) 1323 K ​(1050 °C, ​1922 °F)
Ígbà ìhó3471 K ​(3198 °C, ​5788 °F)
Kíki (near r.t.)10 g/cm3
Heat of fusion14 kJ/mol
Heat of 400 kJ/mol
Molar heat capacity27.2 J/(mol·K)
Atomic properties
Oxidation states+3 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
ElectronegativityPauling scale: 1.1
Covalent radius215 pm
Color lines in a spectral range
Spectral lines of actinium
Other properties
Natural occurrencefrom decay
Crystal structure ​(fcc)
Face-centered cubic crystal structure for actinium
Thermal conductivity12 W/(m·K)
Magnetic orderingno data
CAS Number7440-34-8
Main isotopes of actinium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct
225Ac syn 10 days α 5.935 221Fr
226Ac syn 29.37 hours β 1.117 226Th
ε 0.640 226Ra
α 5.536 222Fr
227Ac 100% 21.773 years β 0.045 227Th
α 5.042 223Fr
Àdàkọ:Category-inline
| references

Àktíníọ̀m tabi Actinium je is a radioactive apilese kemika alagbararadio to ni ami-idamo Ac ati nomba atomu 89, to je wiwari ni odun 1899.

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