Template:Infobox curium

Curium, ₉₆Cm

Curium
Pronunciation	/ˈkjʊəriəm/ ​(KEWR-ee-əm)
Appearance	sillery metallic, glows purpie in the dark
Mass number	[247]
Curium in the periodic cairt
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 Airn Cobalt Nickel Capper Zinc Gallium Germanium Arsenic Selenium Bromine Krypton Rubidium Strontium Yttrium Zirconium Niobium Molybdenum Technetium Ruthenium Rhodium Palladium Siller (element) 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 Gowd Mercur (element) Thallium Leid (element) 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 Ununtrium Flerovium Ununpentium Livermorium Ununseptium Ununoctium Gd ↑ Cm ↓ (Uqo) americium ← curium → berkelium
Atomic nummer (Z)	96
Group	group n/a
Period	period 7
Block	f-block
Element category	Actinide
Electron confeeguration	[Rn] 5f7 6d1 7s2
Electrons per shell	2, 8, 18, 32, 25, 9, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	1613 K ​(1340 °C, ​2444 °F)
Bylin pynt	3383 K ​(3110 °C, ​5630 °F)
Density (near r.t.)	13.51 g/cm3
Heat o fusion	13.85 kJ/mol
Vapour pressur P (Pa) 1 10 100 1 k 10 k 100 k at T (K) 1788 1982
Atomic properties
Oxidation states	+2, +3, +4, +5, +6 (an amphoteric oxide)
Electronegativity	Pauling scale: 1.3
Ionisation energies	1st: 581 kJ/mol
Atomic radius	empirical: 174 pm
Covalent radius	169±3 pm
Colour lines in a spectral range Spectral lines o curium
Ither properties
Naitural occurrence	synthetic
Creestal structur	​dooble hexagonal close packed Dooble hexagonal close packed creestal structur for curium
Electrical resistivity	1.25 µΩ·m
Magnetic orderin	antiferromagnetic-paramagnetic transition at 52 K
CAS Nummer	7440-51-9
History
Namin	named after Marie Skłodowska-Curie an Pierre Curie
Diskivery	Glenn T. Seaborg, Ralph A. James, Albert Ghiorso (1944)
Main isotopes o curium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 242Cm syn 160 d SF – α 238Pu 243Cm syn 29.1 y α 239Pu ε 243Am SF – 244Cm syn 18.1 y SF – α 240Pu 245Cm syn 8500 y SF – α 241Pu 246Cm syn 4730 y α 242Pu SF – 247Cm syn 1.56×107 y α 243Pu 248Cm syn 3.40×105 y α 244Pu SF – 250Cm syn 9000 y SF – α 246Pu β− 250Bk

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	1340	—	—
K	1613	1610	3
F	2444	2440	4
WD	!
input	C: 1340, K: 1613, F: 2444
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	3110	—	—
K	3383	3380	3
F	5630	5630	0
WD	!
input	C: 3110, K: 3383, F: 5630
comment

References

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