102
No
259
Nobelium (No)
Element 102 · Period 7 · Actinide series
actinide
solid at room temp
f-block
radioactive
synthetic
About Nobelium
Named after Nobel. Second-to-last actinoid.
Physical Properties
Atomic Mass
259 u
State at 25°C
Solid
Melting Point
827 °C
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Rn] 5f¹⁴ 7s²
Electron Shells
2, 8, 18, 32, 32, 8, 2
Electronegativity
1.3
Atomic Radius
246 pm
Ionization Energy
642 kJ/mol
Oxidation States
+2, +3
Discovery & History
Discovered By
Joint Institute for Nuclear Research
Discovery Year
1966
Named By
Joint Institute for Nuclear Research
Name origin: Alfred Nobel
Frequently Asked Questions
- Is Nobelium a metal, nonmetal, or metalloid?
- Nobelium is classified as a actinide.
- What state is Nobelium in at room temperature?
- Nobelium is a solid at standard room temperature (25°C).
- What is the atomic mass of Nobelium?
- Nobelium has an atomic mass of 259 atomic mass units (u).
- Who discovered Nobelium?
- Nobelium was discovered by Joint Institute for Nuclear Research in 1966.
- Where is Nobelium on the periodic table?
- Nobelium is element number 102, located in period 7, part of the actinide series shown below the main table.