To ensure purity and safety, Rubidium (Rb) must be kept in a dry mineral oil or in a vacuum. It needs to be stored in this way because it is highly reactive with air and water.
In a dry mineral oil, so that they don't react with air and/or water.
Rubidium and caesium
Caesium is the 5th element in group I of the periodic table. It is an alkali metal, and they become more reactive as you go down the group from lithium to sodium to potassium etc. So we would expect that caesium is highly reactive, even more reactive than rubidium.
lithium, sodium, caesium, rubidium sulphides: Me2S.
Caesium metal is gives a bright blue solution when dissolved in liquid ammonia. The dissolving is believed to cause the production of caesium ions and a free electron. a similar blue colr is produced by sodium, potassium and rubidium. In aqueous alkali solutions caesium ion is colorless and therefore unless the anion is colored the solution is colorless.
Potassium is an alkali metal, other memebers of the family are lithium, Li; sodium, Na; rubidium, Rb; caesium, Cs; francium, Fr
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Francium, caesium, rubidium
Rubidium and caesium
The elements are: lithium, sodium, potassium, rubidium, caesium and francium.
Caesium: 1860 Rubidium: 1861 Francium: 1939
Lithium, Natrium, Kalium, Rubidium, Caesium and Francium, that's it
No, rubidium and caesium can also sink in water
Only caesium has the same properties as caesium. There are other elements which have some similar properties.
The chemical reactions of francium are probably similar to the reactions of caesium or rubidium.
Sodium, Potassium, Rubidium, Caesium, and Francium
Mercury-Hg Gallium-Ga Francium-Fr Caesium-Cs RubidiumRb Bromine-Br
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