Dubnium
105
Db
Golongan
5
Periode
7
Blok
d
Proton
Elektron
Neutron
105
105
157
Sifat Umum
Nomor atom
105
Massa atom
[268]
Nomor massa
262
Kategori
Logam transisi
Warna
n/a
Radioaktif
Ya
Named after the Russian town of Dubna
Struktur kristal
n/a
Sejarah
Dubnium was reportedly first discovered in 1968 at the Joint Institute for Nuclear Research at Dubna.
Researchers there bombarded an americium-243 target with neon-22 ions.
In the same year, a team led by Albert Ghiorso working at the University of California, Berkeley conclusively synthesized the element by bombarding a californium-249 target with nitrogen-15 ions.
Researchers there bombarded an americium-243 target with neon-22 ions.
In the same year, a team led by Albert Ghiorso working at the University of California, Berkeley conclusively synthesized the element by bombarding a californium-249 target with nitrogen-15 ions.
Elektron per kulit
2, 8, 18, 32, 32, 11, 2
Konfigurasi elektron
[Rn] 5f14 6d3 7s2
The Berkeley team proposed the name hahnium for the element
Sifat Fisika
Fase
Solid
Kepadatan
39 g/cm3
Titik lebur
-
Titik didih
-
Kalor peleburan
n/a
Kalor penguapan
n/a
Kapasitas kalor molar
-
Kelimpahan di kerak bumi
n/a
Kelimpahan di alam semesta
n/a
Kredit Gambar: Wikimedia Commons (Hrustov)
The element is named after after the Russian town of Dubna, the location of the Joint Institute for Nuclear Research
Nomor CAS
53850-35-4
Nomor PubChem CID
n/a
Sifat Atom
Jari-jari atom
-
Jari-jari kovalen
149 pm
Elektronegativitas
-
Potensi Ionisasi
-
Volume atom
-
Kondusivitas termal
0,58 W/cm·K
Bilangan oksidasi
5
Aplikasi
Dubnium is used for scientific research purposes only.
Dubnium is harmful due to its radioactivity
Isotop
Isotop stabil
-Isotop tidak stabil
255Db, 256Db, 257Db, 258Db, 259Db, 260Db, 261Db, 262Db, 263Db, 264Db, 265Db, 266Db, 267Db, 268Db, 269Db, 270Db