However there is a lot of funny facts about Rubidium that most people don't know. In the case of Rubidium the group number is 1. Rubidium is a soft, silvery-white metallic element of the alkali metals group (Group 1). RUBIDIUM METAL is a strong reducing agent. Rubidium-87 is an isotope of rubidium. Burns spontaneously in dry oxygen [Mellor 2:468 1946-47]. It is a reactive one. Name: Rubidium Symbol: Rb Atomic Number: 37 Atomic Mass: 85.4678 amu Melting Point: 38.89 °C (312.04 K, 102.002 °F) Boiling Point: 688.0 °C (961.15 K, 1270.4 °F) Number of Protons/Electrons: 37 Number of Neutrons: 48 Classification: Alkali Metal Crystal Structure: Cubic Density @ 293 K: 1.532 g/cm 3 Color: silver Atomic Structure Mass number of rb is 37. Readily catches fire in air when molten or with a sulfur vapor [Mellor 2: 469 1946-47]. Rubidium-87 was the first and the most popular atom for making Bose–Einstein condensates in dilute atomic gases . Rubidium element is in the s block. Rubidium. Rubidium (Rb) is a silver-white coloured metal that has the atomic number 37 in the periodic table. It is an Alkali Metal and is located in Group 1 of the periodic table. Rubidium-87 atom is the stable isotope of rubidium with relative atomic mass 86.909184, 27.9 atom percent natural abundance and nuclear spin 3/2. It is one of the most electropositive and alkaline elements. Shall we have a look? Rubidium can be liquid at ambient temperature, but only on a hot day given that its melting point is about 40°C. If the periodic table is complete just scroll up and read the number on the top (from 1 to 18). it has the symbol Rb. Even though rubidium-85 is more abundant, rubidium-87 has a positive scattering length, which means it is mutually repulsive, at low temperatures.

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