Curium

96
Cm
Gruppe
n/a
Periode
7
Blok
f
Protons
Electrons
Neutrons
96
96
151
General Properties
Atomnummer
96
Atommasse
[247]
Mass Number
247
Kategori
Actinider
Farve
Silver
Radioactive
Ja
Curium is named after Madame Curie and her husband Pierre Curie
Krystalstruktur
Simpel Hexagonal
History
Curium was discovered by Glenn T. Seaborg, Ralph A. James and Albert Ghiorso in 1944 at the University of California, Berkeley.

It was produced by bombarding plutonium with alpha particles during the Manhattan Project.

Curium metal was produced only in 1951 by reduction of curium fluoride with barium.
Elektroner i hver skal
2, 8, 18, 32, 25, 9, 2
Elektronkonfiguration
[Rn] 5f7 6d1 7s2
Cm
Curium accumulates in the bones, lungs and liver, where it promotes cancer
Physical Properties
Tilstandsform
Fast stof
Massefylde
13,51 g/cm3
Smeltepunkt
1613,15 K | 1340 °C | 2444 °F
Kogepunkt
3383,15 K | 3110 °C | 5630 °F
Smeltevarme
n/a
Fordampningsvarme
n/a
Varmefylde
-
Abundance in Earth's crust
n/a
Abundance in Universe
n/a
Illustration
Billede akkrediteringer: Images-of-elements
Illustration of curium
CAS Number
7440-51-9
PubChem CID Number
n/a
Atomic Properties
Atomradius
174 pm
Kovalent radius
169 pm
Elektronegativitet
1,3 (Paulings skala)
Ionization Potential
5,9915 eV
Atomic Volume
18,28 cm3/mol
Varmeledningsevne
0,1 W/cm·K
Oxidationstrin
3, 4
Applications
Curium is mainly used for scientific research purposes.

Curium is a common starting material for the production of higher transuranic elements and transactinides.

The most practical application of 244Cm is as α-particle source in the alpha particle X-ray spectrometers (APXS).
Curium is harmful due to its radioactivity
Isotoper
Stable Isotopes
-
Unstable Isotopes
233Cm, 234Cm, 235Cm, 236Cm, 237Cm, 238Cm, 239Cm, 240Cm, 241Cm, 242Cm, 243Cm, 244Cm, 245Cm, 246Cm, 247Cm, 248Cm, 249Cm, 250Cm, 251Cm, 252Cm