105
Db
268
Dubnium (Db)
Element 105 · Period 7 · Group 5
transition-metal
solid at room temp
d-block
radioactive
synthetic
About Dubnium
Superheavy synthetic element. Named after Dubna research center.
Physical Properties
Atomic Mass
268 u
State at 25°C
Solid
Density
29.3 g/cm³
Magnetism
Unknown
Atomic Properties
Electron Configuration
[Rn] 5f¹⁴ 6d³ 7s²
Electron Shells
2, 8, 18, 32, 32, 11, 2
Oxidation States
+5
Discovery & History
Discovered By
Joint Institute for Nuclear Research
Discovery Year
1968
Named By
IUPAC
Name origin: Dubna, Russia
Frequently Asked Questions
- Is Dubnium a metal, nonmetal, or metalloid?
- Dubnium is classified as a transition-metal.
- What state is Dubnium in at room temperature?
- Dubnium is a solid at standard room temperature (25°C).
- What is the atomic mass of Dubnium?
- Dubnium has an atomic mass of 268 atomic mass units (u).
- Who discovered Dubnium?
- Dubnium was discovered by Joint Institute for Nuclear Research in 1968.
- Where is Dubnium on the periodic table?
- Dubnium is element number 105, located in period 7 and group 5.