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Rubidium is a chemical element with symbol Rb and atomic number 37. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, such as very rapid oxidation in air.ubidium has a number of oxides, including rubidium monoxide (Rb 2 O), Rb 6 O and Rb 9 O 2, which form if rubidium metal is exposed to air; rubidium in excess oxygen gives the superoxide RbO 2. Rubidium forms salts with halides, making rubidium fluoride, rubidium chloride, rubidium bromide, and rubidium iodide.
Best Answer: Potassium (pronounced /pÉËtaesiÉm/) pÉËtÃ¦siÉm is a chemical. Element it has the Symbol (K: latin, kalium From: Ø§ÙÙÙÙÙÙÙÙâ Ø§ÙÙÙÙÙ-al âqalyah plantâ, ashes. Cf alkali from the same), root atomic number, 19 and atomic mass.39. 0983potassium was first isolated from. potashhe name kalium was taken from the word alkali, which came from Arabic al qalÄ«y = the calcined ashes. The name potassium was made from the word potash, which is English, and originally meant an alkali extracted in a pot from the ash of burnt wood or tree leaves.