Amẹrísíọ̀m
Chemical element with atomic number 95Àdàkọ:SHORTDESC:Chemical element with atomic number 95
Americium, 95 Am Fáìlì:Americium2.jpg Americium Pípè / ˌ æ m ᵻ ˈ r ɪ s i ə m / (AM -ə-RISS -ee-əm ) Ìhànsójú silvery white nọ́mbà ìsújọ [243] Americium ní orí tábìlì àyè
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 Color lines in a spectral range 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 (t 1/2 )
Decay mode
Product
241 Am
syn
432.2 y
SF
-
-
α
5.486
237 Np
242m Am
syn
141 y
IT
0.049
242 Am
α
5.637
238 Np
SF
-
-
243 Am
syn
7370 y
SF
-
-
α
5.275
239 Np
Àdàkọ:Category-inline | references
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
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