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Rubidium
| Symbol: | Rb |
| Atomic number: | 37 |
| Melting point: | 39.48 ℃ |
| Boiling point | 961 K (688 ℃, 1270 ℉) |
| Density (near r.t.) | 1.532 g/cm3 |
| when liquid (at m.p.) | 1.46 g/cm3 |
| Heat of fusion | 2.19 kJ/mol |
| Heat of vaporization | 69 kJ/mol |
| Molar heat capacity | 31.060 J/(mol·K) |
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