Template:Infobox berkelium

Berkelium, ₉₇Bk

File:Berkelium metal.jpg
Berkelium
Pronunciation	/bərˈkiːliəm/ (bər-KEE-lee-əm) /ˈbɜːrkliəm/ (BUR-klee-əm)
Appearance	silvery
Mass number	[247]
Berkelium 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 Tb ↑ Bk ↓ — curium ← berkelium → californium
Atomic number (Z)	97
Group	f-block groups (no number)
Period	period 7
Block	f-block
Electron configuration	[Rn] 5f9 7s2
Electrons per shell	2, 8, 18, 32, 27, 8, 2
Physical properties
Phase at STP	solid
Melting point	beta: 1259 K ​(986 °C, ​1807 °F)
Boiling point	beta: 2900 K ​(2627 °C, ​4760 °F)
Density (near r.t.)	alpha: 14.78 g/cm3 beta: 13.25 g/cm3
Heat of fusion	7.92 kJ/mol (calculated)
Atomic properties
Oxidation states	common: +3 +2,? +4, +5
Electronegativity	Pauling scale: 1.3
Ionization energies	1st: 601 kJ/mol
Atomic radius	empirical: 170 pm
Color lines in a spectral range Spectral lines of berkelium
Other properties
Natural occurrence	synthetic
Crystal structure	​double hexagonal close-packed (dhcp) Double hexagonal close packed crystal structure for berkelium
Thermal conductivity	10 W/(m⋅K)
Magnetic ordering	paramagnetic
CAS Number	7440-40-6
History
Naming	after Berkeley, California, where it was discovered
Discovery	Lawrence Berkeley National Laboratory (1949)
Isotopes of berkelium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 245Bk synth 4.94 d ε 245Cm α 241Am 246Bk synth 1.8 d α 242Am β+ 246Cm 247Bk synth 1380 y α 243Am 248Bk synth >9 y α 244Am 249Bk synth 330 d β− 249Cf α 245Am SF –

Bk · Berkelium
Cm ← ibox Cm	iso 97 Bk  [] IB-Bk [] IBisos []	→ Cf ibox Cf
File:Symbol category class.svg cat:Bk (0) File:Symbol category class.svg cat:Bk-isotopes (0) File:Commons-logo.svg Commons File:Wikidata-logo.svg Wikidata:Q1882 File:Wiktionary-logo.svg Wiktionary
indexes by PT (page)

child table, as reused in {IB-Bk}
Main isotopes of berkelium
Main isotopes Decay abun­dance half-life (t1/2) mode pro­duct 245Bk synth 4.94 d ε 245Cm α 241Am 246Bk synth 1.8 d α 242Am β+ 246Cm 247Bk synth 1380 y α 243Am 248Bk synth >9 y α 244Am 249Bk synth 330 d β− 249Cf α 245Am SF –

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
File:Notification-icon-Wikidata-logo.svg Wikidata
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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