Àktíníọ̀m

Lát'ọwọ́ Wikipedia, ìwé ìmọ̀ ọ̀fẹ́
(Àtúnjúwe láti Actinium)
Lọ sí: atọ́ka, àwárí
Actinium
89Ac
La

Ac

Ute
radiumactiniumthorium
Ìhànsójú
silvery
Àwọn ìdámọ́ wíwọ́pọ̀
Orúkọ, àmì-ìdámọ́, nọ́mbà actinium, Ac, 89
Ẹ̀ka ẹ́límẹ̀nti actinide
Ẹgbẹ́, àsìkò, àdìpò n/a7, f
Ìwúwo átọ́mù (227)
Ìtòléra ẹ̀lẹ́ktrónì [Rn] 6d1 7s2
2, 8, 18, 32, 18, 9, 2
Physical properties
Phase solid
Density (near r.t.) 10 g·cm−3
Melting point (circa) 1323 K, 1050 °C, 1922 °F
Boiling point 3471 K, 3198 °C, 5788 °F
Heat of fusion 14 kJ·mol−1
Heat of vaporization 400 kJ·mol−1
Molar heat capacity 27.2 J·mol−1·K−1
Atomic properties
Oxidation states 3
(neutral oxide)
Electronegativity 1.1 (Pauling scale)
Ionization energies 1st: 499 kJ·mol−1
2nd: 1170 kJ·mol−1
Covalent radius 215 pm
Miscellanea
Crystal structure face-centered cubic
Actinium has a face-centered cubic crystal structure
Magnetic ordering no data
Thermal conductivity 12 W·m−1·K−1
CAS registry number 7440-34-8
Àwọn ísótòpù dídúró jùlọ
Main article: Àwọn ísótòpù actinium
iso NA half-life DM DE (MeV) DP
225Ac syn 10 days α 5.935 221Fr
226Ac syn 29.37 hours β 1.117 226Th
ε 0.640 226Ra
α 5.536 222Fr
227Ac 100% 21.773 years β 0.045 227Th
α 5.042 223Fr
· r

Àktíníọ̀m tabi Actinium je is a radioactive apilese kemika alagbararadio to ni ami-idamo Ac ati nomba atomu 89, to je wiwari ni odun 1899.

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