96
Cm
247
Curium (Cm)
Element 96 · Period 7 · Actinide series
actinide
solid at room temp
f-block
radioactive
synthetic
About Curium
Radioactive metal. Used as power source in spacecraft (Mars rovers).
Physical Properties
Atomic Mass
247 u
State at 25°C
Solid
Melting Point
1340 °C
Boiling Point
3110 °C
Density
13.51 g/cm³
Magnetism
Paramagnetic
Atomic Properties
Electron Configuration
[Rn] 5f⁷ 6d¹ 7s²
Electron Shells
2, 8, 18, 32, 25, 9, 2
Electronegativity
1.3
Atomic Radius
245 pm
Ionization Energy
581 kJ/mol
Oxidation States
+3
Discovery & History
Discovered By
Glenn T. Seaborg
Discovery Year
1944
Named By
Glenn T. Seaborg
Name origin: Pierre and Marie Curie
Frequently Asked Questions
- Is Curium a metal, nonmetal, or metalloid?
- Curium is classified as a actinide.
- What state is Curium in at room temperature?
- Curium is a solid at standard room temperature (25°C).
- What is the atomic mass of Curium?
- Curium has an atomic mass of 247 atomic mass units (u).
- Who discovered Curium?
- Curium was discovered by Glenn T. Seaborg in 1944.
- Where is Curium on the periodic table?
- Curium is element number 96, located in period 7, part of the actinide series shown below the main table.