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امېرېسيوم

د ويکيپېډيا، وړیا پوهنغونډ له خوا
Americium,  95Am
Spectral lines of americium
عمومي خواص
Pronunciation /ˌæməˈrɪsiəm/
AM-ə-RIS-ee-əm
Appearancesilvery white
Americium په دوراني جدول کې
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oxygen (diatomic nonmetal)
Fluorine (diatomic nonmetal)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (polyatomic nonmetal)
Sulfur (polyatomic nonmetal)
Chlorine (diatomic nonmetal)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (polyatomic nonmetal)
Bromine (diatomic nonmetal)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (diatomic nonmetal)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanide)
Cerium (lanthanide)
Praseodymium (lanthanide)
Neodymium (lanthanide)
Promethium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Dysprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Thulium (lanthanide)
Ytterbium (lanthanide)
Lutetium (lanthanide)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (metalloid)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinide)
Thorium (actinide)
Protactinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Americium (actinide)
Curium (actinide)
Berkelium (actinide)
Californium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrencium (actinide)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Nihonium (unknown chemical properties)
Flerovium (unknown chemical properties)
Moscovium (unknown chemical properties)
Livermorium (unknown chemical properties)
Tennessine (unknown chemical properties)
Oganesson (unknown chemical properties)
Eu

Am

(Uqe)
plutoniumamericiumcurium
اټومي شمیره (Z)95
گروپ, پیریودgroup n/a, period 7
بلاکf-block
Element category  actinide
Mass number243 (most stable isotope)
Electron configuration[Rn] 5f7 7s2
Electrons per shell
2, 8, 18, 32, 25, 8, 2
فزیکي خواص
حالت (at STP)جامد
دويلې کيدو ټکى1449 K ​(1176 °C, ​2149 °F)
يشنا ټکی2880 K ​(2607 °C, ​4725 °F) (calculated)
Density near r.t.12 g/cm3
Heat of fusion14.39 kJ/mol
Molar heat capacity62.7 J/(mol·K)
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1239 1356
اټومي خواص
Oxidation states8, 7, 6, 5, 4, 3, 2 ​(an amphoteric oxide)
ElectronegativityPauling scale: 1.3
Ionization energies
  • 1st: 578 kJ/mol
Atomic radiusempirical: 173 pm
Covalent radius180±6 pm
Miscellanea
Crystal structuredouble hexagonal close-packed (dhcp)
Double hexagonal close packed crystal structure for americium
Double hexagonal close packed crystal structure for americium
د تودوخې تېرېدنه10 W/(m·K)
Electrical resistivity0.69 µΩ·m[۱]
Magnetic orderingparamagnetic
Magnetic susceptibility (χmol)+1000.0·10−6 cm3/mol[۲]
CAS Number7440-35-9
History
Namingafter the Americas
DiscoveryGlenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Main isotopes of americium
آيسو­ټوپ Abun­dance نیم ژوند (t1/2) Decay mode Pro­duct

کينډۍ:Infobox element/isotopes decay2 کينډۍ:Infobox element/isotopes decay3 کينډۍ:Infobox element/isotopes decay2

| references | in Wikidata

امېرېسيوم (په انگرېزي: Americium) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Am سمبول او ۹۵ اتمي شمېرې په وسیله ښودل شوی دی.

مشخصات[سمول]

تاریخچه[سمول]

مرکبات[سمول]

د استعمال ځایونه[سمول]

سرچينې[سمول]

  1. Muller, W.; Schenkel, R.; Schmidt, H. E.; Spirlet, J. C.; McElroy, D. L.; Hall, R. O. A.; Mortimer, M. J. (1978). "The electrical resistivity and specific heat of americium metal". Journal of Low Temperature Physics. 30 (5–6): 561. Bibcode:1978JLTP...30..561M. doi:10.1007/BF00116197. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)
  2. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. مخونه E110. د کتاب نړيواله کره شمېره 0-8493-0464-4. منځګړی |CitationClass= له پامه غورځول شوی (لارښود)

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