Periodic Table of the Elements
Chemical & Physical Properties of Technetium
Technetium
| Latin name | Tecnetium |
| English name | Technetium |
| chemical symbol | Tc |
| atomic number | 43 |
| relative atomic mass | (97,9072) |
| period | 5 |
| group | VII.B |
| classification | transition metals |
| discovery year | 1937 |
| discoverer | G. Pierre, E. Segré |
| melting point [°C] | 2172 |
| boiling point [°C] | 4877 |
| density [g cm-3] | 11,5 |
| electronegativity [Pauling] | 1,9 |
| oxidation states | IV, VI, VII |
| electron configuration | [Kr]4d5 5s2 |
| atomic radius [pm] | 183 |
| covalent radius [pm] | 156 |
| specific heat [J g-1K-1] | 0,21 |
| heat of fusion [kJ mol-1] | 24,0 |
| thermal conductivity [W m-1 K-1] | 51 |
| el. conductivity [S m-1] | 5.106 |
| 1. ionizing potential [eV] | 7,28 |
| 2. ionizing potential [eV] | 15,26 |
| 3. ionizing potential [eV] | 29,54 |
| point of superconductivity [K] | 11 |
| state at normal conditions | solid |
Resources
- HOAG, Hannah. Radioactive medicine without the nuclear headache. In: The Globe and Mail [online]. 2012-01-20 [cit. 2012-07-31]. Available from: http://www.theglobeandmail.com/.../article547499/
- HUME, Mark. Canadian researchers develop a new way to produce medical isotopes. In: The Globe and Mail [online]. 2012-02-20 [cit. 2012-08-03]. Available from: http://www.theglobeandmail.com/.../article4092466/
- LANG, Otto. Skripta. In: Klinika nukleární medicíny [online]. [cit. 2012-08-03]. Available from: http://old.lf3.cuni.cz/.../scriptai.htm
- REMY, Heinrich. Anorganická chemie - II. díl. 2. české vydání, dotisk. Praha: SNTL 1972, s. 250-251
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