Dubnium ek chemical element hae, jiske chemical symbol Db, atomic number 105 aur atomic mass 268 hae. II ek badalte dhaatu hae.

Atomic Structure
Symbol Db
Atomic Number 105
Atomic Mass 268 g/mol
Periodic Table
Group 5
Row / Period 7
Element Category Transition dhaatu
Chhapa
Dubnium ke electron shell