Actinium
| Latin name | Actinium |
| English name | Actinium |
| chemical symbol | Ac |
| atomic number | 89 |
| relative atomic mass | (227,0278) |
| period | 7 |
| group | III.B |
| classification | transition metals |
| discovery year | 1899 |
| discoverer | Andre Debierne |
| melting point [°C] | 1051 |
| boiling point [°C] | 3198 |
| density [g cm-3] | 10,07 |
| electronegativity [Pauling] | 1,1 |
| oxidation states | III |
| electron configuration | [Rn]6d1 7s2 |
| atomic radius [pm] | 195 |
| heat of fusiuon [kJ mol-1] | 14,2 |
| 1. ionizing potential [eV] | 5,17 |
| 2. ionizing potential [eV] | 10,148 |
| state at normal conditions | solid |
Resources
- BARBALACE, Kenneth. Periodic Table of Elements - Actinium - Ac. In: EnvironmentalChemistry.com [online]. 1995-2013 [cit. 2013-05-10]. Available from: http://environmentalchemistry.com/
- REMY, Heinrich. Anorganická chemie - II. díl. 2. české vydání, dotisk. Praha: SNTL 1972, s. 75-77
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