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Amerisyo

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(Idinirekta mula sa Americium)
Americium, 95Am
Americium
Pronunciation /ˌæməˈrɪsiəm/ (AM-ə-RISS-ee-əm)
Appearancesilvery white
Mass number[243]
Americium 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 Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson
Eu

Am

plutoniumamericiumcurium
Atomic number (Z)95
Groupn/a
Period7
Block  f-block
Electron configuration[Rn] 5f7 7s2
Electrons per shell2, 8, 18, 32, 25, 8, 2
Physical properties
Phase at STPsolido
Melting point1449 K ​(1176 °C, ​2149 °F)
Boiling point2880 K ​(2607 °C, ​4725 °F) (calculated)
Density (near r.t.)12 g/cm3
Heat of fusion14.39 kJ/mol
Molar heat capacity28[1] J/(mol·K)
Vapor 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 (isang anpoterong oksido)
ElectronegativityPauling scale: 1.3
Ionization energies
  • 1st: 578 kJ/mol
Atomic radiusempirical: 173 pm
Covalent radius180±6 pm
Color lines in a spectral range
Mga linyang espektral ng americium
Other properties
Natural occurrencesintetiko
Crystal structuredouble hexagonal close-packed (dhcp)
Double hexagonal close packed crystal structure for americium
Thermal conductivity10 W/(m⋅K)
Electrical resistivity0.69 µΩ⋅m[1]
Magnetic orderingparamagnetic
Molar magnetic susceptibility+1000.0×10−6 cm3/mol[2]
CAS Number7440-35-9
History
Namingafter the Americas
DiscoveryGlenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Isotopes of americium
Main isotopes[3] Decay
abun­dance half-life (t1/2) mode pro­duct
241Am synth 432.2 y α 237Np
SF
242m1Am synth 141 y IT 242Am
α 238Np
SF
243Am synth 7350 y α 239Np
SF
Kategorya Kategorya: Americium
| references

Ang americium o amerisyo (Kastila: americio, may sagisag na Am, atomikong bilang na 95, espesipikong grabidad na 11.7, at balensiyang 3, 4, 5, at 6). Isa itong elementong metaliko, maputi, at trans-uraniko, na kabilang sa serye ng aktinido. Nagtataglay ito ng mga isotopong may bilang ng masa mula 237 hanggang 246. Mayroon itong mga hating-buhay[t 1] mula 25 mga minuto hanggang 7,950 taon. Sa pananaliksik, pinagmumulan ito ng mga sinag-alpa,[t 2] partikular na ang mga isotopong Am 241 at Am 243. Natuklasan ito nina Glenn Theodore Seaborg, Leon O. Morgan, Ralph A. James, Stanley G. Thompson, at Albert Ghiorso noong 1945.[4]

Talababa[baguhin | baguhin ang wikitext]

  1. Ingles: half-life
  2. Ingles: alpha particle

Mga sanggunian[baguhin | baguhin ang wikitext]

  1. 1.0 1.1 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.{{cite journal}}: CS1 maint: date auto-translated (link)
  2. Weast, Robert (1984). CRC, Handbook of Chemistry and Physics. Boca Raton, Florida: Chemical Rubber Company Publishing. pp. E110. ISBN 0-8493-0464-4.{{cite book}}: CS1 maint: date auto-translated (link)
  3. Kondev, F. G.; Wang, M.; Huang, W. J.; Naimi, S.; Audi, G. (2021). "The NUBASE2020 evaluation of nuclear properties" (PDF). Chinese Physics C. 45 (3): 030001. doi:10.1088/1674-1137/abddae.{{cite journal}}: CS1 maint: date auto-translated (link)
  4. Gaboy, Luciano L. Americium, amerisyum, amerisyo - Gabby's Dictionary: Praktikal na Talahuluganang Ingles-Filipino ni Gabby/Gabby's Practical English-Filipino Dictionary, GabbyDictionary.com.