Hahnium (Ha)/Dubnium (Db)

Hahnium (Ha)/Dubnium (Db)

Atomic Number: 105
Atomic Weight: 262
Melting Point: unknown
Boiling Point: unknown
Specific Gravity: unknown
Valence(s): 5

Hahnium was discovered in 1968 by a team led by Georgy Flerov at Joint Institute for Nuclear Research. An artificial radioactive isotope of the metallic element Cesium, Hahnium is used rarely in radiotherapy. Provisionally, Hafnium was known as Unnilpentium. Hahnium was renamed Dubnium (Db) by the International Union of Pure and Applied Chemistry (IUPAC). [LM] {NR}