#105
Dubnium
transition metal· Solid·268 u
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.
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Identity
- Symbol
- Db
- Atomic Number
- 105
- Atomic Mass
- 268 u
- Category
- transition metal
- Block
- d-block
- Period
- 7
- Group
- 5
- Appearance
- Chemical element with atomic number 105 (Db)
- Year Discovered
- 1967 CE
- Discovered By
- Joint Institute for Nuclear Research
- Named By
- Dubna
Electrons
- Configuration
- *[Rn] 5f14 6d3 7s2
- Full Configuration
- 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f14 6d3
- Shells
- 2, 8, 18, 32, 32, 11, 2
- Electronegativity
- n/a
- Electron Affinity
- n/a
- Oxidation States
- 5, 4, 3
Physical Properties
- State at
- Unknown
- Melting Point
- n/a
- Boiling Point
- n/a
- Density
- 29.3
- Crystal Structure
- n/a
- Magnetic Ordering
- n/a
Mechanical
Thermal & Electrical
Abundance
- Universe
- 0
- Sun
- 0
- Meteorite
- 0
- Earth's Crust
- 0
- Ocean
- 0
- Human Body
- 0