{"version":"1.0","type":"link","title":"Rubidium - Newikis","description":"Rubidium is chemical element 37 on the periodic table. Its symbol is Rb. Its atomic mass is 85.47. It has 37 protons and 37 electrons. It is a soft silver colored metal. It was first discovered in 1861 by Robert Bunsen and Gustav Kirchoff in Heidelberg, Germany.","provider_name":"Newikis","provider_url":"https://newikis.com","cache_age":86400,"thumbnail_url":"https://thumb.wikimedia.org/wikipedia/commons/thumb/c/c9/Rb5.JPG/1280px-Rb5.JPG","thumbnail_width":1280,"thumbnail_height":960}