Indium
['In', '160221', 'Wikipedia:Vital articles/Level/4', '銦', 'Indium', '7440-74-6', '1863-01-01T00:00:00Z', 'indigo', ' Hieronymous Theodor Richter', ' Great Soviet Encyclopedia (1926–1947)', ' or the same stability (or half-lifetime if they are unstable)']