Berkelium, ₉₇Bk

Berkelium
Pípè	/bərˈkɛliəm/ (bər-KEL-ee-əm) /ˈbɜːrkliəm/ (BUR-klee-əm)
Ìhànsójú	silvery
nọ́mbà ìsújọ	[247]
Berkelium ní orí tábìlì àyè
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 ↓ (Uqs) curium ← berkelium → californium
Nọ́mbà átọ̀mù (Z)	97
Ẹgbẹ́	group n/a
Àyè	àyè 7
Àdìpọ̀	Àdìpọ̀-f
Ẹ̀ka ẹ́límẹ́ntì	Actinide
Ìtò ẹ̀lẹ́ktrọ́nù	[Rn] 5f9 7s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 32, 27, 8, 2
Àwọn ohun ìní ara
Ìfarahàn at STP	solid
Ìgbà ìyọ́	(beta) 1259 K ​(986 °C, ​1807 °F)
Kíki (near r.t.)	(alpha) 14.78 g/cm3 (beta) 13.25 g/cm3
Atomic properties
Oxidation states	+2, +3, +4, +5[1]
Electronegativity	Pauling scale: 1.3
Atomic radius	empirical: 170 pm
Spectral lines of berkelium
Other properties
Natural occurrence	synthetic
Crystal structure	​hexagonal close-packed (hcp)
Thermal conductivity	10 W/(m·K)
Magnetic ordering	no data
CAS Number	7440-40-6
Main isotopes of berkelium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 245Bk syn 4.94 d ε 0.810 245Cm α 6.455 241Am 246Bk syn 1.8 d α 6.070 242Am ε 1.350 246Cm 247Bk syn 1380 y α 5.889 243Am 248Bk syn >9 y α 5.803 244Am 249Bk syn 330 d α 5.526 245Am SF - - β− 0.125 249Cf
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1. ↑ Kovács, Attila; Dau, Phuong D.; Marçalo, Joaquim; Gibson, John K. (2018). "Pentavalent Curium, Berkelium, and Californium in Nitrate Complexes: Extending Actinide Chemistry and Oxidation States". Inorg. Chem. (American Chemical Society) 57 (15): 9453–9467. doi:10.1021/acs.inorgchem.8b01450. PMID 30040397.