Rutherfordium



104 dubnium
Hf
↑
Rf
↓
(Upq)
General
Number rutherfordium, Rf, 104
transition metals
Block d
Standard atomic weight (265)  g·mol−1
Rn] 5f14 6d2 7s2
shell 2, 8, 18, 32, 32, 10, 2
Physical properties
Phase presumably a solid
r.t.) 23 (est.)  g·cm−3
Atomic properties
Crystal structure cubic body centered
Oxidation states 3, 4
Ionization energies 1st: 580 kJ/mol
Atomic radius (calc.) 150  pm
Covalent radius 74 (calc.)  pm
Miscellaneous
CAS registry number 53850-36-5
Selected isotopes
Main article: Isotopes of rutherfordium
iso NA half-life DM DE (MeV) DP
265Rf syn 13 h
References

Rutherfordium (atomic number 104. This is a highly half-life of approximately 13 hours.

This element therefore has no applications and little is known about it. Rutherfordium is the first hafnium.

History

Rutherfordium was reportedly nuclear fission tracks in a special type of glass with a microscope which indicated the presence of a new element.

In 1969 researchers at the University of California, Berkeley synthesized the element by subjecting 249C to high energy collisions. The UC group also stated that they could not reproduce the earlier synthesis by Soviet scientists.

This resulted in an Element 105 was named Dubnium, instead.)[1]

References

  1. ^ Michael Freemantle (2003). Rutherfordium. Chemical & Engineering News.
  • Los Alamos National Laboratory Rutherford
 
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