Compare Silver vs Technetium
Comparing Silver (Ag) and Technetium (Tc). Atomic numbers 47 and 43 with atomic masses 107.868 u and 98.906 u, classified as transition metal and transition metal. Below: a side-by-side comparison of their physical, atomic, electron-configuration and historical properties, including density, melting and boiling points, ionization energies, oxidation states and discovery history.
Periodic properties of the elements
| Silver | Technetium | |
|---|---|---|
| Symbol | Ag | Tc |
| Atomic number | 47 | 43 |
| Group | 11 | 7 |
| Period | 5 | 5 |
| Block | d | d |
| Element category | Transition Metal | Transition Metal |
Physical properties
| Silver | Technetium | |
|---|---|---|
| Phase at STP | Solid | Solid |
| Density | 10.49 g/cm3 | 11 g/cm3 |
| Atomic weight | 107.868 u | 98.9062 u |
| Melting point | 1234.93 K 961.78 °C 1763.204 °F | 2430 K 2156.85 °C 3914.33 °F |
| Boiling point | 2435 K 2161.85 °C 3923.33 °F | 4538 K 4264.85 °C 7708.73 °F |
Atomic properties
| Silver | Technetium | |
|---|---|---|
| Electronegativity (Pauling Scale) | 1.93 | 1.9 |
| Electron affinity | 125.862 kJ/mol | 53 kJ/mol |
| Oxidation states | −2, −1, +1, +2, +3 (an amphoteric oxide) | −3, −1, 0, +1, +2, +3, +4, +5, +6, +7 (a strongly acidic oxide) |
| Ionization energies |
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Electron configuration
| Silver | Technetium | |
|---|---|---|
| Shorthand configuration | [Kr] 4d10 5s1 | [Kr] 4d5 5s2 |
| Full configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1 | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d5 5s2 |
| Electrons per shell | 2, 8, 18, 18, 1 | 2, 8, 18, 13, 2 |
History
| Silver | Technetium | |
|---|---|---|
| Prediction | Dmitri Mendeleev (1871) | |
| Discovery | Asia Minor (5000 BC) | Carlo Perrier, Emilio Segrè (1937) |
| First isolation | Carlo Perrier, Emilio Segrè (1937) |