Amẹrísíọ̀m

Amẹrísíọ̀m tabi Americium je apilese alasopapo to ni ami-idamo Am ati nomba atomu 95. Gege bi apilese onide alagbararadio, americium je aktinidi ti o je bibosowo Glenn T. Seaborg ni 1944 nigba to n digbolu plutonium pelu awon neutroni be sini o je apilese teyinuraniom kerin to je wiwari. Won soloruko fun orile Amerika, ni ibaramu mo europium.^[1]

Americium, ₉₅Am

Fáìlì:Americium2.jpg
Americium
Pípè	/ˌæmᵻˈrɪsiəm/ ​(AM-ə-RISS-ee-əm)
Ìhànsójú	silvery white
nọ́mbà ìsújọ	[243]
Americium 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 Eu ↑ Am ↓ (Uqp) plutonium ← americium → curium
Nọ́mbà átọ̀mù (Z)	95
Ẹgbẹ́	group n/a
Àyè	àyè 7
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Actinide
Ìtò ẹ̀lẹ́ktrọ́nù	[Rn] 5f7 7s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 32, 25, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	1449 K ​(1176 °C, ​2149 °F)
Ígbà ìhó	2880 K ​(2607 °C, ​4725 °F)
Kíki (near r.t.)	12 g/cm3
Heat of fusion	14.39 kJ/mol
Molar heat capacity	62.7 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1239 1356
Atomic properties
Oxidation states	+2, +3, +4, +5, +6, +7 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Electronegativity	Pauling scale: 1.3
Atomic radius	empirical: 173 pm
Covalent radius	180±6 pm
Spectral lines of americium
Other properties
Natural occurrence	synthetic
Crystal structure	​hexagonal
Thermal conductivity	10 W/(m·K)
Magnetic ordering	no data
CAS Number	7440-35-9
Main isotopes of americium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 241Am syn 432.2 y SF - - α 5.486 237Np 242mAm syn 141 y IT 0.049 242Am α 5.637 238Np SF - - 243Am syn 7370 y SF - - α 5.275 239Np
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