Rf

Rutherfordium

Identification

CAS Number: 53850-36-5

Discovery Year: 1969

Discoverer: A. Ghiorso, et al

Discovery Location: United States

Properties

Atomic Mass: 267 →Density: 23.3 g/cm³ →

Electronic Structure

Electron Config: [Rn] 5f14 6d2 7s2

Block: d

Period: 7 →Group: 4 →

Abundance & Geochemistry

Goldschmidt Class: synthetic

About

Radioactive transactinide element. Expected to have similar chemical properties to those displayed by hafnium. Rf-260 was discovered by the Joint Nuclear Research Institute at Dubna (U.S.S.R.) in 1964. Researchers at Berkeley discovered Unq-257 and Unq-258 in 1964.

Isotopes

Rf-265 265 ☢ 6.60 min

Rf-267 267 ☢ 2.50 h