Dubnium is a chemical element with symbol Db and atomic number 105. It is named after the town of Dubna in Russia (north of Moscow), where it was first produced. It is a synthetic element (an element that can be created in a laboratory but is not found in nature) and radioactive; the most stable known isotope, dubnium-268, has a half-life of approximately 28 hours.
105 Atomic Number
268 u Atomic Mass
null K Melting Point
null K Boiling Point
29.3 g/cm³ Density
null Å Atomic Radius
null Å Covalent Radius
null eV First Ionization Energy
7 Number of Shells
2, 8, 18, 32, 32, 11, 2 Electron Shell Occupations
