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Dubnium (Db)
Atomic number: 105 · Category: transition metal · Group 5 · Period 7 · Phase: Solid
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.
Block: d
CPK color:#d1004f
Electronic structure
Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d3
Configuration (semantic): *[Rn] 5f14 6d3 7s2
Shells: 2, 8, 18, 32, 32, 11, 2
Periodic position
Group: 5
Period: 7
xpos: 5
ypos: 7
Spectral/Bohr images
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3D Model