People do not "invent" naturally occurring elements; they only "discover" them. To discover Rb & Cs, Bunsen & Kirchhoff found the new-fangled spectroscope quite indispensable.
http://en.wikipedia.org/wiki/Rubidium#History
http://en.wikipedia.org/wiki/Cesium#History
Ceasium will explode and create hydrogen gas and ceasium hydroxide. Ceasium react with water similary to other alkali metals (lithium, sodium, potassium, rubidium)
Cs - Caesium
Rubidium hypochlorite is the name for this chemical formula.
sodium, francium, ceasium
The word equation for rubidium and chlorine is: rubidium + chlorine -> rubidium chloride.
Rb is the symbol for the element, rubidium.
Ceasium is a metal element. Atomic number of it is 55.
Ceasium is a metal element. Atomic number of it is 55.
Rb is rubidium, O is oxygen. They will combine to form Rb2O which is called rubidium oxide.
Rubidium is not flammable.
Rubidium has two natural isotopes (85Rb and 87Rb) and 30 artificial isotopes.
Mixing rubidium hydroxide with water produces rubidium hydroxide solution. Rubidium hydroxide is a strong base that ionizes in water to give rubidium cations and hydroxide anions.