96
Cm
Curium
(247)
2818322592
#96

Curium

actinide· Solid·247 u

Curium is a transuranic radioactive chemical element with symbol Cm and atomic number 96. This element of the actinide series was named after Marie and Pierre Curie – both were known for their research on radioactivity. Curium was first intentionally produced and identified in July 1944 by the group of Glenn T. Seaborg at the University of California, Berkeley.

Identity

Symbol
Cm
Atomic Number
96
Atomic Mass
247 u
Category
actinide
Block
f-block
Period
7
Group
3
Appearance
silvery metallic, glows purple in the dark
Year Discovered
1944 CE
Discovered By
Glenn T. Seaborg
Named By
Pierre Curie

Electrons

Configuration
[Rn] 5f7 6d1 7s2
Full Configuration
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p6 6s2 4f14 5d10 6p6 7s2 5f7 6d1
Shells
2, 8, 18, 32, 25, 9, 2
Electronegativity
1.28
Electron Affinity
27.17
Oxidation States
+3
Ionization Energies
581

Physical Properties

Curium
State at
Solid
Melting Point
1613
Boiling Point
3383
Density
13.51
Crystal Structure
HEX
Magnetic Ordering
Antiferromagnetic

Mechanical

Thermal & Electrical

Specific Heat
120 J/(kg K) J/(g·K)
Heat of Vaporization
160 kJ/mol kJ/mol
Heat of Fusion
15 kJ/mol kJ/mol

Abundance

Universe
0
Sun
0
Meteorite
0
Earth's Crust
0
Ocean
0
Human Body
0