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Technetium is a chemical element; it has symbol Tc and atomic number 43. It is the lightest element whose isotopes are all radioactive. Technetium is one of only two radioactive elements both preceded and succeeded in the periodic table by elements with stable forms, the other being promethium. All available technetium is produced as a synthetic element.…
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element technetium-99 nuclear radioactive produced technetium-99m metal isotopes pertechnetate fission half-life tc used isotope one two elements table uranium molybdenum
| Subject | Predicate | Object | Confidence | Src |
|---|---|---|---|---|
| Technetium | 95mTc | synth | 1.00 | infobox |
| Technetium | 96Tc | synth | 1.00 | infobox |
| Technetium | 97mTc | synth | 1.00 | infobox |
| Technetium | 97Tc | synth | 1.00 | infobox |
| Technetium | 98Tc | synth | 1.00 | infobox |
| Technetium | 99mTc | synth | 1.00 | infobox |
| Technetium | 99Tc | trace | 1.00 | infobox |
| Technetium | Appearance | shiny gray metal | 1.00 | infobox |
| Technetium | at T (K) | 2727 | 1.00 | infobox |
| Technetium | Atomic number (Z) | 43 | 1.00 | infobox |
| Technetium | Atomic radius | empirical: 136 pm | 1.00 | infobox |
| Technetium | Block | d-block | 1.00 | infobox |
| Technetium | Boiling point | 4538 K (4265 °C, 7709 °F) | 1.00 | infobox |
| Technetium | CAS Number | 7440-26-8 | 1.00 | infobox |
| Technetium | Covalent radius | 147±7 pm | 1.00 | infobox |
| Technetium | Crystal structure | hexagonal close-packed (hcp) (hP2) | 1.00 | infobox |
| Technetium | Density (at 20° C) | 98Tc: 11.359 g/cm3 99Tc: 11.475 g/cm3 | 1.00 | infobox |
| Technetium | Discovery and first isolation | Carlo Perrier and Emilio Segrè (1937) | 1.00 | infobox |
| Technetium | Electrical resistivity | 200 nΩ⋅m (at 20 °C) | 1.00 | infobox |
| Technetium | Electron configuration | [Kr] 4d5 5s2 | 1.00 | infobox |
| Technetium | Electronegativity | Pauling scale: 1.9 | 1.00 | infobox |
| Technetium | Electrons per shell | 2, 8, 18, 13, 2 | 1.00 | infobox |
| Technetium | Group | group 7 | 1.00 | infobox |
| Technetium | Heat of fusion | 33.29 kJ/mol | 1.00 | infobox |
| Technetium | Heat of vaporization | 585.2 kJ/mol | 1.00 | infobox |
| Technetium | Ionization energies | 1st: 686.9 kJ/mol | 1.00 | infobox |
| Technetium | Ionization energies | 2nd: 1470 kJ/mol | 1.00 | infobox |
| Technetium | Ionization energies | 3rd: 2850 kJ/mol | 1.00 | infobox |
| Technetium | Lattice constants | a = 274.12 pm c = 439.90 pm (at 20 °C) | 1.00 | infobox |
| Technetium | Magnetic ordering | Paramagnetic | 1.00 | infobox |
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