Amerisyo

Gikan sa Wikipedia, ang gawasnong ensiklopedya
(Naredirek gikan sa Americium)
Americium
95Am
Eu

Am

(Uqs)
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Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)
plutoniumamericiumcurium
Panagway
silvery white
Kinatibuk-ang mga kinaiya
Ngalan, simbolo, kaiphan americium, Am, 95
Paglitok /ˌæməˈrɪsiəm/
[[Help:Pronunciation respelling key|Plantilya:Smallcaps all-ə-Plantilya:Smallcaps all-ee-əm]]
Kategoriyang elemento aktinido
Group, period, block 37, f
Gibug-aton sa atomo (243)
Kontorno sa elektron [Rn] 5f7 7s2
2, 8, 18, 32, 25, 8, 2
Electron shells of americium (2, 8, 18, 32, 25, 8, 2)
Electron shells of americium (2, 8, 18, 32, 25, 8, 2)
History
Pagkadiskobre Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso (1944)
Physical properties
Phase magahi
Density (near r.t.) 12 g·cm−3
Melting point 1449 K, 1176 °C, 2149 °F
Boiling point 2880 K, 2607 °C, 4725 °F
Heat of fusion 14.39 kJ·mol−1
Molar heat capacity 62.7 J·mol−1·K−1
Vapor pressure
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K) 1239 1356
Atomic properties
Oxidation states 7, 6, 5, 4, 3, 2
(amphoteric oxide)
Electronegativity 1.3 (Pauling scale)
Ionization energies 1st: 578 kJ·mol−1
Atomic radius 173 pm
Covalent radius 180±6 pm
Miscellanea
Crystal structure hexagonal
Americium has a hexagonal crystal structure
Magnetic ordering paramagnetic
Electrical resistivity 0.69[1] µΩ·m
Thermal conductivity 10 W·m−1·K−1
CAS registry number 7440-35-9
Most stable isotopes
Main article: Isotopes of americium
iso NA half-life DM DE (MeV) DP
241Am trace 432.2 y SF - -
α 5.486 237Np
242mAm trace 141 y IT 0.049 242Am
α 5.637 238Np
SF - -
243Am trace 7370 y SF - -
α 5.275 239Np
· r

Ang amerisyo (Iningles americium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Am ug kaiphan nga atomik 95. Ang amerisyo mao ang aktinido.

Ang mga gi basihan niini[usba | usba ang wikitext]

  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.


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