Atomic number: 75
Category: transition metal
Density at 25°C: solid: density: 21.02 g·cm−3
This is one of the most expensive metals due to it's relative rarity in relation to it's demand. Combined with nickel to produce a super alloy, it is used in turbine blades, exhaust jets of engines and catalysts.
Use, natural applications or common combinations:
- jet nozzles
- alloys, catalysts
- Standard atomic weight: 186.207(1)
- Melting point: 3186 °C
- Boiling point: 5596 °C
- Radioactivity: some is slightly radioactive.
- 187Re (62%) radioactive with half life of 4.12×1010 years emitting beta and alpha particles