Dubnium

Dubnium, ₁₀₅Db

Dubnium
Pípè	/ˈduːbniəm/ (DOOB-nee-əm) /ˈdʌbniəm/ (DUB-nee-əm)
Ìhànsójú	unknown, probably silvery, white or metallic gray
nọ́mbà ìsújọ	[268]
Dubnium 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 Ta ↑ Db ↓ (Upp) rutherfordium ← dubnium → seaborgium
Nọ́mbà átọ̀mù (Z)	105
Ẹgbẹ́	group 5
Àyè	àyè 7
Àdìpọ̀	Àdìpọ̀-d
Ẹ̀ka ẹ́límẹ́ntì	Transition metal
Ìtò ẹ̀lẹ́ktrọ́nù	[Rn] 5f14 6d3 7s2
Iye ẹ̀lẹ́ktrọ́nù lórí ìpele kọ̀ọ̀kan	2, 8, 18, 32, 32, 11, 2 (predicted)
Àwọn ohun ìní ara
Ìfarahàn at STP	Solid
Kíki (near r.t.)	unknown g/cm3
Atomic properties
Oxidation states	(+3), (+4), +5 Àdàkọ:Infobox element/symbol-to-oxidation-state/comment
Atomic radius	calculated: unknown pm
Covalent radius	unknown pm
Other properties
Natural occurrence	synthetic
Crystal structure	​unknown Unknown crystal structure for dubnium
CAS Number	53850-35-4
Main isotopes of dubnium
Iso­tope Abun­dance Half-life (t1/2) Decay mode Pro­duct 270Db syn ~23.1 h SF 268Db syn 16-32 h SF ε ? 268Rf 267Db syn 1.2 h SF 266Db syn 22 m ε 266Rf 263Db syn 27 s 56% SF 41% α 8.36 259Lr 3% ε 263mRf 262Db syn 34 s 67% α 8.66,8.45 258Lr 33% SF 261Db syn 1.8 s α 8.93 257Lr 260Db syn 1.5 s α 9.13,9.08,9.05 256Lr 259Db syn 0.5 s α 9.47 255Lr 258Db syn 4.4 s 67% α 9.17,9.08,9.01 254Lr 33% ε 258Rf 257mDb syn 0.76 s α 9.16 253Lr 257gDb syn 1.50 s α 9.07,8.97 253Lr 256Db syn 1.6 s 70% α 9.12,9.08,9.01,8.89 253Lr 30% ε 256Rf