Sample of the Alkali metal Rubidium, element number 37. This reactive metal can only exist in a sealed glass ampoule

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Photo credit: © Kim Christensen / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: 37, active, alkali, capsule, chemistry, closeup, dangerous, element, flask, laboratory, metal, oxidation, periodic, properties, rare, rb, rubidium, storage