The freezing temperature at a normal sea level air pressure is negative 78.5 degrees.
Left wait what are you asking tho
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Answer:
- Rubidium Rb was discovered in 1861
- It was discovered by the German chemist Robert Wilhelm Bunsen and the German physicist Gustav-Robert Kirchoff
Explanation:
Rubidium was discovered by the German chemists Robert Bunsen and Gustav Kirchhoff in 1861 while analyzing samples of the mineral lepidolite with a device called a spectroscope. The sample produced a set of deep red spectral lines they had never seen before. Bunsen was eventually able to isolate samples of rubidium metal. Today, most rubidium is obtained as a byproduct of refining lithium.
The first one would be it
