Bẹ́rkẹ́líọ̀m
Chemical element with atomic number 97Àdàkọ:SHORTDESC:Chemical element with atomic number 97
Berkelium, 97 Bk Berkelium Pípè Ìhànsójú silvery nọ́mbà ìsújọ [247] Berkelium ní orí tábìlì àyè
Nọ́mbà átọ̀mù (Z ) 97 Ẹgbẹ́ group n/a Àyè àyè 7 Àdìpọ̀ Àdìpọ̀-f Ẹ̀ka ẹ́límẹ́ntì Actinide Ìtò ẹ̀lẹ́ktrọ́nù [Rn ] 5f9 7s2 Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan 2, 8, 18, 32, 27, 8, 2 Àwọn ohun ìní ara Ìfarahàn at STP solid Ìgbà ìyọ́ (beta) 1259 K (986 °C, 1807 °F) Kíki (near r.t. ) (alpha) 14.78 g/cm3 (beta) 13.25 g/cm3 Atomic properties Oxidation states +2, +3 , +4, +5[1] Electronegativity Pauling scale: 1.3 Atomic radius empirical: 170 pm Color lines in a spectral range Spectral lines of berkelium Other properties Natural occurrence synthetic Crystal structure hexagonal close-packed (hcp) Thermal conductivity 10 W/(m·K) Magnetic ordering no data CAS Number 7440-40-6 Main isotopes of berkelium
Isotope
Abundance
Half-life (t 1/2 )
Decay mode
Product
245 Bk
syn
4.94 d
ε
0.810
245 Cm
α
6.455
241 Am
246 Bk
syn
1.8 d
α
6.070
242 Am
ε
1.350
246 Cm
247 Bk
syn
1380 y
α
5.889
243 Am
248 Bk
syn
>9 y
α
5.803
244 Am
249 Bk
syn
330 d
α
5.526
245 Am
SF
-
-
β−
0.125
249 Cf
Àdàkọ:Category-inline | references
Bẹ́rkẹ́líọ̀m tabi Berkelium je apilese alasopapo to ni ami-idamo Bk ati nomba atomu 97. Gege bi apilese onide alagbararadio ninu eseese aktinidi , berkelium koko je sisopapo nipa didigbolu americium pelu awon igbonwo alpha (awon ioni helium ), o si je sisoloruko fun Yunifasiti Kalifornia ni Berkeley. Berkelium ni apilese teyinuraniom karun to je sisopapo.
Itokasi
↑ Kovács, Attila; Dau, Phuong D.; Marçalo, Joaquim; Gibson, John K. (2018). "Pentavalent Curium, Berkelium, and Californium in Nitrate Complexes: Extending Actinide Chemistry and Oxidation States". Inorg. Chem. (American Chemical Society) 57 (15): 9453–9467. doi:10.1021/acs.inorgchem.8b01450 . PMID 30040397 .
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