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Rubidium is a chemical element; it has symbol Rb and atomic number 37. It is a very soft, whitish-grey solid in the alkali metal group, similar to potassium and caesium . [ 9 ] Rubidium is the first alkali metal in the group to have a density higher than water .
Like other alkali metal oxides, Rb 2 O is a strong base. Thus, Rb 2 O reacts exothermically with water to form rubidium hydroxide. Rb 2 O + H 2 O → 2 RbOH. So reactive is Rb 2 O toward water that it is considered hygroscopic. Upon heating, Rb 2 O reacts with hydrogen to rubidium hydroxide and rubidium hydride: [2] Rb 2 O + H 2 → RbOH + RbH
Rubidium sesquioxide is a chemical compound with the formula Rb 2 O 3 or more accurately Rb 4 O 6.In terms of oxidation states, Rubidium in this compound has a nominal charge of +1, and the oxygen is a mixed peroxide (O 2− 2) and superoxide (O − 2) for a structural formula of (Rb +) 4 (O − 2) 2 (O 2− 2). [4]
An electrode in which oxidation takes place is called an anode while in that which reduction takes place is called cathode. This applies for both electrolytic and electrochemical cells, though the charge on them reverses. The red cat and an ox mnemonics are useful to remember the same. Red cat: Reduction at cathode; An ox: Anode for oxidation. [32]
The chemical elements can be broadly divided into metals, metalloids, and nonmetals according to their shared physical and chemical properties.All elemental metals have a shiny appearance (at least when freshly polished); are good conductors of heat and electricity; form alloys with other metallic elements; and have at least one basic oxide.
Periodic table of the chemical elements showing the most or more commonly named sets of elements (in periodic tables), and a traditional dividing line between metals and nonmetals. The f-block actually fits between groups 2 and 3 ; it is usually shown at the foot of the table to save horizontal space.
Rubidium sulfide is an inorganic compound and a salt with the chemical formula Rb 2 S. It is a white solid with similar properties to other alkali metal sulfides . Production
Alkali metals: The metals of group 1: Li, Na, K, Rb, Cs, Fr Alkaline earth metals: The metals of group 2: Be, Mg, Ca, Sr, Ba, Ra Transition elements * Elements in groups 3 to 11 or 3 to 12 (the latter making up the d-block) Pnictogens: The elements of group 15: N, P, As, Sb, Bi † Chalcogens: The elements of group 16: O, S, Se, Te, Po † Halogens