Template:Infobox curium

Curium, ₉₆Cm

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Curium
Pronunciation	/ˈkjʊəriəm/ Template:Error-small ​(KURE-ee-əm)
Appearance	silvery metallic, glows purple in the dark
Mass number	[247]
Curium in the periodic table
Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon Sodium Magnesium Aluminium Silicon Phosphorus Sulfur Chlorine Argon Potassium Calcium Scandium Titanium Vanadium Chromium Manganese Iron Cobalt Nickel Copper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Silver Cadmium Indium Tin Antimony Tellurium Iodine Xenon Caesium Barium Lanthanum Cerium Praseodymium Neodymium Promethium Samarium Europium Gadolinium Terbium Dysprosium Holmium Erbium Thulium Ytterbium Lutetium Hafnium Tantalum Tungsten Rhenium Osmium Iridium Platinum Gold Mercury (element) Thallium Lead Bismuth Polonium Astatine Radon Francium Radium Actinium Thorium Protactinium Uranium Neptunium Plutonium Americium Curium Berkelium Californium Einsteinium Fermium Mendelevium Nobelium Lawrencium Rutherfordium Dubnium Seaborgium Bohrium Hassium Meitnerium Darmstadtium Roentgenium Copernicium Nihonium Flerovium Moscovium Livermorium Tennessine Oganesson Gd ↑ Cm ↓ — americium ← curium → berkelium
Atomic number (Z)	96
Group	f-block groups (no number)
Period	period 7
Block	f-block
Electron configuration	[Rn] 5f7 6d1 7s2
Electrons per shell	2, 8, 18, 32, 25, 9, 2
Physical properties
Phase at STP	solid
Melting point	1613 K ​(1340 °C, ​2444 °F)
Boiling point	3383 K ​(3110 °C, ​5630 °F)
Density (near r.t.)	13.51 g/cm3
Heat of fusion	13.85 kJ/mol
Vapor pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1788 1982
Atomic properties
Oxidation states	common: +3 +4, +5, +6
Electronegativity	Pauling scale: 1.3
Ionization energies	1st: 581 kJ/mol
Atomic radius	empirical: 174 pm
Covalent radius	169±3 pm
Color lines in a spectral range Spectral lines of curium
Other properties
Natural occurrence	synthetic
Crystal structure	​double hexagonal close-packed (dhcp) Double hexagonal close packed crystal structure for curium
Electrical resistivity	1.25 µΩ⋅m
Magnetic ordering	antiferromagnetic-paramagnetic transition at 52 K
CAS Number	7440-51-9
History
Naming	named after Marie Skłodowska-Curie and Pierre Curie
Discovery	Glenn T. Seaborg, Ralph A. James, Albert Ghiorso (1944)
Isotopes of curium
Main isotopes Decay Isotope abun­dance half-life (t1/2) mode pro­duct 242Cm synth 162.8 d α 238Pu SF – CD 208Pb 243Cm synth 29.1 y α 239Pu ε 243Am SF – 244Cm synth 18.11 y α 240Pu SF – 245Cm synth 8250 y α 241Pu SF – 246Cm synth 4706 y α 242Pu SF – 247Cm synth 1.56×107 y α 243Pu 248Cm synth 3.48×105 y α 244Pu SF – 250Cm synth 8300 y SF – α 246Pu β− 250Bk

Cm · Curium
Am ← ibox Am	iso 96 Cm  [] IB-Cm [] IBisos []	→ Bk ibox Bk
File:Symbol category class.svg cat:Cm (0) File:Symbol category class.svg cat:Cm-isotopes (0)  Commons  Wikidata:Q1876 File:Wiktionary-logo.svg Wiktionary
indexes by PT (page)

child table, as reused in {IB-Cm}
Main isotopes of curium
Main isotopes Decay Isotope abun­dance half-life (t1/2) mode pro­duct 242Cm synth 162.8 d α 238Pu SF – CD 208Pb 243Cm synth 29.1 y α 239Pu ε 243Am SF – 244Cm synth 18.11 y α 240Pu SF – 245Cm synth 8250 y α 241Pu SF – 246Cm synth 4706 y α 242Pu SF – 247Cm synth 1.56×107 y α 243Pu 248Cm synth 3.48×105 y α 244Pu SF – 250Cm synth 8300 y SF – α 246Pu β− 250Bk

Data sets read by {{Infobox element}}
Name and identifiers
Symbol etymology (11 non-trivial)
Top image (caption, alt)	caption: alt:
Pronunciation
Allotropes (overview)
Group (overview)
Period (overview)
Block (overview)
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Isotopes
Standard atomic weight
most stable isotope
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Wikidata *
* Not used in {{Infobox element}} (2023-01-01) See also {{Index of data sets}} · Cat:data sets (0) · (this table: )

References

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