Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of rubidium-85 (atomic number: 37), the most common isotop
Diagram of the nuclear composition, electron configuration, and valence orbitals of an atom of rubidium-85 (atomic number: 37), the most common isotope of this element. The nucleus consists of 37 protons (blue) and 48 neutrons (red). The stability of an element's outer (valence) electrons determines its chemical and physical properties. Rubidium is an alkali metal in group 1, period 5, and the s-block of the periodic table. In elemental form, it is a soft, extremely reactive metal that is denser than water, melting at 39 degrees Celsius.
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Photo credit: © CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No
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