Rf - Rutherfordium

This artifical element, named after Ernest Rutherford, was discovered by Ghiorso and coworkers.

Atomic number - 104 Density g/mL -
Atomic weight u 261 Melting point K -
Bonding radius A - Boiling point K -
Atomic radius A - Heat of vaporization kJ/mol -
Ionization Potential V - Heat of fusion kJ/mol -
Electronegativity - - Specific heat J/gK -
The oxide is unknown.
Crystal are unknown.

Electron config. : [Rn] 5f14 6d2 7s2

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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
H He
Li Be B C N O F Ne
Na Mg Al Si P S Cl Ar
K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
Cs Ba La* Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
Fr Ra Ac** Rf Db Sg Bh Hs Mt 110 111 112 113
Lanthanides* Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Actinides ** Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Isotopes of Rf: Click mass number for decay process, product for element page.
253
1.8 sec
a/SF,9.500
No-249/?
253.0 		254
0.5 msec
a/SF,9.500
No-250/?
254.0 		255
1.5 sec
a/SF,9.300
No-251/?
255.10150 		256
6.7 msec
a/SF,9.600
No-252/?
256.10118 		257
4.7 sec
a/EC/SF,9.250
No-253/Lr-257/?
257.10327 		258
12 msec
a/SF,4.300
No-254/?
258.10347 		259
3.1 sec
a/EC/SF,9.110
No-255/Lr-259/?
259.10561
260
20.1 msec
a/SF,9.870
No-256/?
260.10653 		261
65 sec
a/EC/SF,8.810
No-257/Lr-261/?
261.10891 		262
1.2 sec
SF,10.560 MeV
?
262.11003 		263

,10.735 MeV

263.11272 		264

,9.690 MeV

264.11411 		265

,10.800 MeV

265.11680 		266

,10.820 MeV

266.11851
MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/27/98. This is not a publication of Phoenix College.