Symbol	Cm
Atomic number	96
Group	-
Period	7
Block	f
Classification	Actinide

Appearance	Silvery metallic, glows purple in the dark
Color	Silver

Number of protons	96 p+
Number of neutrons	151 n0
Number of electrons	96 e-

From Wikipedia, the free encyclopediaCurium 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.

Phase at STP	Solid
Density	13.51 g/cm3
Atomic weight	247 u

Melting point	1613 K 1339.85 °C 2443.73 °F
Boiling point	3383 K 3109.85 °C 5629.73 °F
Heat of vaporization	-

Electronegativity (Pauling Scale)	1.28
Electron affinity	27.17 kJ/mol
Oxidation states	+3, +4, +5, +6 (an amphoteric oxide)
Ionization energies	581 kJ/mol 1196 kJ/mol 2026 kJ/mol 3550 kJ/mol

Electron configuration Shorthand configuration	[Rn] 5f7 6d1 7s2
Electron configuration Full configuration	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f7 6s2 6p6 6d1 7s2
Electron configuration chart	1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 4f14 5s2 5p6 5d10 5f7 6s2 6p6 6d1 7s2
Electrons per shell	2, 8, 18, 32, 25, 9, 2
Valence electrons	2
Valency electrons	3
Bohr model	Figure: Shell diagram of Curium (Cm) atom.
Orbital Diagram 1s 2s 2p 3s 3p 3d 4s 4p 4d 4f 5s 5p 5d 5f 6s 6p 6d 7s

Discovery

Glenn T. Seaborg, Ralph A. James, Albert Ghiorso (1944)

CAS Number	7440-51-9
ChemSpider ID	22415
EC number	-
PubChem CID Number	23979