Aktinio
89
Ac
Grupo
Neniu
Perio
7
Bloko
f
Protonoj
Elektronoj
Neŭtronoj
89
89
138
Ĝeneralaj Propraĵoj
Atoma Nombro
89
Atommaso
[227]
Amasa Nombro
227
Kategorio
Aktinoidoj
Koloro
Arĝento
Radioaktiva
Jes
From the Greek aktis, aktinos, meaning beam or ray
Kristala Strukturo
Vizaĝo Centrita Kubo
Historio
André-Louis Debierne, a French chemist, discovered actinium in 1899.
He separated it from pitchblende residues left by Marie and Pierre Curie after they had extracted radium.
Friedrich Oskar Giesel independently discovered actinium in 1902 as a substance being similar to lanthanum.
He separated it from pitchblende residues left by Marie and Pierre Curie after they had extracted radium.
Friedrich Oskar Giesel independently discovered actinium in 1902 as a substance being similar to lanthanum.
Elektronoj per ŝelo
2, 8, 18, 32, 18, 9, 2
Elektrona Agordo
[Rn] 6d1 7s2
Actinium glows in the dark with a pale blue light
Fizikaj Propraĵoj
Fazo
Solido
Denso
10,07 g/cm3
Fandpunkto
1323,15 K | 1050 °C | 1922 °F
Bolpunkto
3471,15 K | 3198 °C | 5788,4 °F
Varmo de Fuzio
14 kJ/mol
Varmo de Vaporiĝo
400 kJ/mol
Specifa Varmo Kapacito
0,12 J/g·K
Krusta Abundo
Neniu
Universa Abundo
Neniu
CAS Nombro
7440-34-8
PubChem Kunmetita Identiga Nombro
Neniu
Atomaj Propraĵoj
Atoma Radiuso
-
Kovalenta Radiuso
215 pm
Elektronegativeco
1,1 (Pauling-skalo)
Potencialo de jonigo
5,17 eV
Atoma Volumo
22,54 cm3/mol
Termika Kondukto
0,12 W/cm·K
Oksidaj Ŝtatoj
3
Aplikoj
Actinium is used as an active element of radioisotope thermoelectric generators, for example in spacecraft.
The medium half-life of 227Ac makes it very convenient radioactive isotope in modeling the slow vertical mixing of oceanic waters.
225Ac is applied in medicine to produce 213Bi in a reusable generator or can be used alone as an agent for radiation therapy.
The medium half-life of 227Ac makes it very convenient radioactive isotope in modeling the slow vertical mixing of oceanic waters.
225Ac is applied in medicine to produce 213Bi in a reusable generator or can be used alone as an agent for radiation therapy.
Actinium is highly radioactive
Izotopoj
Stabilaj Izotopoj
-Malstabilaj Isotopoj
206Ac, 207Ac, 208Ac, 209Ac, 210Ac, 211Ac, 212Ac, 213Ac, 214Ac, 215Ac, 216Ac, 217Ac, 218Ac, 219Ac, 220Ac, 221Ac, 222Ac, 223Ac, 224Ac, 225Ac, 226Ac, 227Ac, 228Ac, 229Ac, 230Ac, 231Ac, 232Ac, 233Ac, 234Ac, 235Ac, 236Ac