94
Pu
244
Plutonium (Pu)
Element 94 · Period 7 · Actinide series
actinide
solid at room temp
f-block
radioactive
synthetic
About Plutonium
Highly radioactive. Used in nuclear weapons and as fuel in some reactors. Complex phase behavior.
Physical Properties
Atomic Mass
244 u
State at 25°C
Solid
Melting Point
639.4 °C
Boiling Point
3228 °C
Density
19.84 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Rn] 5f⁶ 7s²
Electron Shells
2, 8, 18, 32, 24, 8, 2
Electronegativity
1.28
Atomic Radius
243 pm
Ionization Energy
585 kJ/mol
Oxidation States
+3 to +6
Discovery & History
Discovered By
Glenn T. Seaborg
Discovery Year
1940
Named By
Glenn T. Seaborg
Name origin: Planet Pluto
Frequently Asked Questions
- Is Plutonium a metal, nonmetal, or metalloid?
- Plutonium is classified as a actinide.
- What state is Plutonium in at room temperature?
- Plutonium is a solid at standard room temperature (25°C).
- What is the atomic mass of Plutonium?
- Plutonium has an atomic mass of 244 atomic mass units (u).
- Who discovered Plutonium?
- Plutonium was discovered by Glenn T. Seaborg in 1940.
- Where is Plutonium on the periodic table?
- Plutonium is element number 94, located in period 7, part of the actinide series shown below the main table.