Dubnium

Atomic number                            105

Atomic mass                                 261.9 g.mol ^-1

Electronic shell                           [Rn] 5f¹⁴ 6d³ 7s²

Isotopes                                       9

Discovered                                  Albert Ghiorso in 1970

The atomic weight of nine known isotopes range from 255 to 263; the longest-lived isotope, dubnium 268 has an half-life of 32 hours.

Applications

Dubnium does not have any application and little is known about it.