Amẹrísíọ̀m

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Americium
95Am
Eu

Am

(Uqp)
plutoniumamericiumcurium
Ìhànsójú
silvery white
250px
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà americium, Am, 95
Ìpèlóhùn /ˌæməˈrɪsiəm/
AM-ə-RIS-ee-əm
Ẹ̀ka ẹ́límẹ̀nti actinide
Ẹgbẹ́, àsìkò, àdìpò n/a7, f
Ìwúwo átọ́mù (243)
Ìtòléra ẹ̀lẹ́ktrónì [Rn] 5f7 7s2
2, 8, 18, 32, 25, 8, 2
Physical properties
Phase solid
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 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 no data
Thermal conductivity 10 W·m−1·K−1
CAS registry number 7440-35-9
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù americium
iso NA half-life DM DE (MeV) DP
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
· r

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]


Itokasi[àtúnṣe | àtúnṣe àmìọ̀rọ̀]

  1. Seaborg, Glenn T. (1946). "The Transuranium Elements". Science 104 (2704): 379–386. doi:10.1126/science.104.2704.379. PMID 17842184. http://www.jstor.org/stable/1675046.