Template:Infobox berkelium

Berkelium, ₉₇Bk

Berkelium
Pronunciation	/bɜːrˈkiːliəm/ (bur-KEE-lee-əm) /ˈbɜːrkliəm/ (BUR-klee-əm)
Appearance	sillery
Mass number	[247]
Berkelium 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 Tb ↑ Bk ↓ (Uqe) curium ← berkelium → californium
Atomic nummer (Z)	97
Group	group n/a
Period	period 7
Block	f-block
Element category	Actinide
Electron confeeguration	[Rn] 5f9 7s2
Electrons per shell	2, 8, 18, 32, 27, 8, 2
Pheesical properties
Phase at STP	solit
Meltin pynt	beta: 1259 K ​(986 °C, ​1807 °F)
Bylin pynt	beta: 2900 K ​(2627 °C, ​4760 °F)
Density (near r.t.)	alpha: 14.78 g/cm3 beta: 13.25 g/cm3
Heat o fusion	7.92 kJ/mol (calculatit)
Atomic properties
Oxidation states	+2, +3, +4, +5
Electronegativity	Pauling scale: 1.3
Ionisation energies	1st: 601 kJ/mol
Atomic radius	empirical: 170 pm
Colour lines in a spectral range Spectral lines o berkelium
Ither properties
Naitural occurrence	synthetic
Creestal structur	​dooble hexagonal close packed Dooble hexagonal close packed creestal structur for berkelium
Thermal conductivity	10 W/(m·K)
Magnetic orderin	paramagnetic
CAS Nummer	7440-40-6
History
Namin	after Berkeley, Californie, whaur it was discovered
Diskivery	Lawrence Berkeley Naitional Laboratory (1949)
Main isotopes o berkelium
Iso­tope Abun­dance Hauf-life (t1/2) Decay mode Pro­duct 245Bk syn 4.94 d ε 245Cm α 241Am 246Bk syn 1.8 d α 242Am ε 246Cm 247Bk syn 1380 y α 243Am 248Bk syn >300 y α 244Am 249Bk syn 330 d α 245Am SF – β− 249Cf

style="text-align:left"| data m.p. cat
	in	calc from C	diff	report	ref
C	986	—	—
K	1259	1259	0
F	1807	1807	0
WD	!
input	C: 986, K: beta: 1259, F: 1807
comment

style="text-align:left"| data b.p. cat
	in	calc from C	diff	report	ref
C	2627	—	—
K	2900	2900	0
F	4760	4761	-1
WD	!
input	C: 2627, K: beta: 2900, F: 4760
comment

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