Dubnium

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Dubnium,  105Db
Sifat umum
Nama, simbol dubnium, Db
Pengucapan /ˈdbniəm/
DOOB-nee-əm
Penampilan tak diketahui
Dubnium di tabel periodik
Hydrogen (diatomic nonmetal)
Helium (noble gas)
Litium (alkali metal)
Berilium (alkaline earth metal)
Boron (metalloid)
Karbon (polyatomic nonmetal)
Nitrogen (diatomic nonmetal)
Oksigen (diatomic nonmetal)
Fluor (diatomic nonmetal)
Neon (noble gas)
Natrium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silikon (metalloid)
Fosfor (polyatomic nonmetal)
Belerang (polyatomic nonmetal)
Klor (diatomic nonmetal)
Argon (noble gas)
Kalium (alkali metal)
Kalsium (alkaline earth metal)
Skandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Kromium (transition metal)
Mangan (transition metal)
Besi (transition metal)
Kobalt (transition metal)
Nikel (transition metal)
Tembaga (transition metal)
Seng (transition metal)
Galium (post-transition metal)
Germanium (metalloid)
Arsenik (metalloid)
Selenium (polyatomic nonmetal)
Bromin (diatomic nonmetal)
Kripton (noble gas)
Rubidium (alkali metal)
Stronsium (alkaline earth metal)
Itrium (transition metal)
Zirkonium (transition metal)
Niobium (transition metal)
Molibdenum (transition metal)
Teknesium (transition metal)
Rutenium (transition metal)
Rodium (transition metal)
Paladium (transition metal)
Perak (transition metal)
Kadmium (transition metal)
Indium (post-transition metal)
Timah (post-transition metal)
Antimon (metalloid)
Telurium (metalloid)
Yodium (diatomic nonmetal)
Xenon (noble gas)
Sesium (alkali metal)
Barium (alkaline earth metal)
Lantanum (lanthanide)
Serium (lanthanide)
Praseodimium (lanthanide)
Neodimium (lanthanide)
Prometium (lanthanide)
Samarium (lanthanide)
Europium (lanthanide)
Gadolinium (lanthanide)
Terbium (lanthanide)
Disprosium (lanthanide)
Holmium (lanthanide)
Erbium (lanthanide)
Tulium (lanthanide)
Iterbium (lanthanide)
Lutesium (lanthanide)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Renium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Emas (transition metal)
Raksa (transition metal)
Talium (post-transition metal)
Timbal (post-transition metal)
Bismut (post-transition metal)
Polonium (post-transition metal)
Astatin (metalloid)
Radon (noble gas)
Fransium (alkali metal)
Radium (alkaline earth metal)
Aktinium (actinide)
Torium (actinide)
Protaktinium (actinide)
Uranium (actinide)
Neptunium (actinide)
Plutonium (actinide)
Amerisium (actinide)
Kurium (actinide)
Berkelium (actinide)
Kalifornium (actinide)
Einsteinium (actinide)
Fermium (actinide)
Mendelevium (actinide)
Nobelium (actinide)
Lawrensium (actinide)
Ruterfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hasium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Kopernisium (transition metal)
Nihonium (unknown chemical properties)
Flerovium (post-transition metal)
Moskovium (unknown chemical properties)
Livermorium (unknown chemical properties)
Tenesin (unknown chemical properties)
Oganeson (unknown chemical properties)
Ta

Db

(Upp)
rutherfordiumdubniumseaborgium
Nomor atom (Z) 105
Golongan, blok golongan 5, blok-d
Periode periode 7
Kategori unsur   logam transisi
Massa atom standar (Ar) [268]
Konfigurasi elektron [Rn] 5f14 6d3 7s2
(predicted)
per kulit
2, 8, 18, 32, 32, 11, 2
(predicted)
Sifat fisika
Fase tak diketahui
Sifat atom
Bilangan oksidasi 5
Jari-jari kovalen 149 (estimated)[1] pm
Lain-lain
Nomor CAS 53850-35-4
Isotop dubnium terstabil
iso NA waktu paruh DM DE (MeV) DP
262Db syn 34 s[2][3] 67% α 8.66,8.45 258Lr
33% SF
263Db syn 27 s[3] 56% SF
41% α 8.36 259Lr
3% ε 263mRf
266Db syn 22 min[3] SF
ε 266Rf
267Db syn 1.2 h[3] SF
268Db syn 29 h[3] SF
ε 268Rf
270Db syn 23.15 h[4] SF

only half times of over 5 seconds are included here

| referensi | di Wikidata

Dubnium (pengucapan: /ˈduːbniəm/) adalah unsur kimia dalam sistem periodik unsur yang memiliki simbol Db dan nomor atom 105. Unsur ini merupakan unsur sintetik yang bersifat radioaktif.

Pranala luar[sunting | sunting sumber]

Referensi[sunting | sunting sumber]

  1. ^ Chemical Data. Dubnium - Db, Royal Chemical Society
  2. ^ Münzenberg, G.; Gupta, M. (2011). "Production and Identification of Transactinide Elements". p. 877. doi:10.1007/978-1-4419-0720-2_19. 
  3. ^ a b c d e Six New Isotopes of the Superheavy Elements Discovered. Berkeley Lab. News center. October 26, 2010
  4. ^ Oganessian, Yu. Ts.; Abdullin, F. Sh.; Bailey, P. D.; Benker, D. E.; Bennett, M. E.; Dmitriev, S. N.; Ezold, J. G.; Hamilton, J. H.; Henderson, R. A. (2010). "Synthesis of a New Element with Atomic Number Z=117". Physical Review Letters 104. Bibcode:2010PhRvL.104n2502O. doi:10.1103/PhysRevLett.104.142502. PMID 20481935.