Discovered By: Albert Ghiorso
Discovery year: 1967

The following table showing some properties of Dubnium(Db):

Table Example
Atomic number 105
Group 5
Period 7
Block d
Electrons 105
Protons 105
Neutrons 165
Atomic weight (270)
Oxidation states +5
Electrons per shell K2 L8 M18 N32 O32 P11 Q2


Table Example
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^2 4d^10 5p^6 6s^2 4f^14 5d^10 6p^6 7s^2 5f^14 6d^3
Valence 5
Radioactive Yes
half life 2*10^4 s
Lifetime 3*10^4 s
Decay mode Alpha emission (α-decay)