Rutherfordium [Rf] (CAS-ID: 53850-36-5) locate me
An: 104 N: 157 Am: [ 261 ]
Group No: 4 Group Name: (none)
Block: d-block Period: 7
State: presumably a solid
Colour: unknown, but probably metallic and silvery white or grey in appearance Classification: Metallic
Boiling Point: unknown (?)
Melting Point: unknown (?)
Density: unknown
Availability: Rutherfordium is a synthetic element that is not present in the environment at all.
Shell Structure diagrams | Atomic Radius diagram
Isotopes

Discovery Information
Who: A. Ghiorso , Nurmia, Harris, K.A.Y. Eskola, and P.L. Eskola
When: 1969
Where: Berkeley California
Name Origin
In honor of Ernest R. Rutherford, a New Zealand physicist.
Sources
Bombarding plutonium with accelerated 113 to 115 MeV Neon ions. Also by bombarding a target of Cf249 with C12 nuclei of 71 MeV , and C13 nuclei of 69 MeV .
Uses
It has no uses.
Notes
Evidence of element 104 was first detected at the Joint Nuclear Research Institute at Dubna (USSR) in 1964 by bombarding plutonium with accelerated 113 to 115 MeV neon ions. By measuring fission tracks in a special glass with a microscope, the scientists detected an isotope that decays by spontaneous fission. The isotope was thought to be Rf260 with a half life of 0.15 to 0.3 seconds. It was not until 1969, however that the group in Berkley were able to chemically separate element 104 and positively identified two possibly three isotopes of the element.
In August of 1997 the International Union of Pure and Applied Chemistry announced the official naming of this element as Rutherfordium with the atomic symbol of Rf. The IUPAC choose Rutherfordium over the Russians' choice of Kurchatovium, which was in honor of Igor Vasilevich Kurchatov (1903-1960), former Head of Soviet Nuclear Research.
Element 104 was previously known as Unnilquadium; from the latin from "one zero four".