What is the name of the element with atomic number 105?

The element with atomic number 105 is Dubnium (Db). In IUPAC nomenclature, option 2  is known as Un-nil-pentium.
Db (105) $={\left[\mathrm{Rn}\right]}^{86}5{\mathrm{f}}^{14}6{\mathrm{d}}^{3}7{\mathrm{s}}^2$