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en.wikipedia.org/wiki/Rubidium

Rubidium was discovered in 1861 by Robert Bunsen and Gustav Kirchhoff, in Heidelberg, Germany, in the mineral lepidolite through flame spectroscopy. Because of the bright red lines in its emission spectrum, they chose a name derived from the Latin word rubidus, meaning "deep red". Rubidium is a minor component in lepidolite.

education.jlab.org/itselemental/ele037.html

Rubidium was discovered by the German chemists Robert Bunsen and Gustav Kirchhoff in 1861 while analyzing samples of the mineral lepidolite (KLi 2 Al(Al, Si) 3 O 10 (F, OH) 2) 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 ...

www.rsc.org/periodic-table/element/37/rubidium

Rubidium is no exception to this rule, being silvery-white and melting at 39 ºC. The element has two naturally occurring isotopes. Rubidium-85 is the dominant form, accounting for 72 per cent of the total, while most of the remainder is the radioactive rubidium-87, which has a half-life of 50 billion years.

www.britannica.com/science/rubidium

Rubidium: Rubidium (Rb), chemical element of Group 1 (Ia) in the periodic table, the alkali metal group. Rubidium is the second most reactive metal and is very soft, with a silvery-white lustre. Rubidium was discovered (1861) spectroscopically by German scientists Robert Bunsen and Gustav Kirchhoff and named

www.livescience.com/34519-rubidium.html

Rubidium was discovered by German chemists Gustav Robert Kirchhoff and Robert Wilhelm Bunsen in 1861 when they were observing the spectrum of the mineral lepidolite as it burned, according to ...

www.chemistrylearner.com/rubidium.html

When Was Rubidium Discovered: Its discovery year is 1861 [1]. How Was It Discovered. After the discovery of lepidolite in the 1760s, it was found to behave oddly. It seemed to contain something other than the known components lithium and potassium since it frothed when thrown on glowing coal and finally hardened like glass. In 1861, Kirchhoff ...

www.answers.com/Q/Who_discovered_rubidium

The atomic number of rubidium (Rb) is 37. The atomic weight of Rb is 85.4678(3) grams per mole. See the Web Links to the left of this answer for a periodic table with more information about this ...

wanttoknowit.com/who-discovered-rubidium

Who discovered rubidium? Rubidium was discovered by German scientists Robert Bunsen and Gustav Kirchhoff in 1861. A year earlier they have invented a type of spectroscope (spectrometer), which is an instrument used to measure the different properties of light. This can be used to identify the molecular or atomic structure of a substance.

www.webelements.com/rubidium/history.html

Rubidium was discovered in 1861 spectroscopically by Robert Bunsen and Gustav Kirchoff as an impurity associated with samples of the mineral lepidolite (a form of mica). The name rubidium (from the Latin "rubidus" - dark red) was coined for its bright red spectroscopic lines.

www.answers.com/Q/On_what_date_was_rubidium_discovered

Rubidium was discovered in 1861 by Robert Bunsen and Gustav Kirchhoff in the mineral lepidolite through the use of a spectroscope. Go. science math history literature technology health law ...