Bk - Berkelium

There is no berkelium in our lab. It was produced by Thompson, Ghiorso and Seaborg in Berkeley, of all places, in 1949.

Atomic number - 97 Density g/mL -
Atomic weight u 247 Melting point K -
Bonding radius A - Boiling point K -
Atomic radius A - Heat of vaporization kJ/mol -
Ionization Potential V 6 .23 Heat of fusion kJ/mol -
Electronegativity - 1 .3 Specific heat J/gK -
The oxide is unknown.
Crystal are unknown.

Electron config. : [Rn] 5f9 7s2

Top | About | Search | Comment | PC Chemistry

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 Bk: Click mass number for decay process, product for element page.
238
144 sec
EC/ECF,5.000
Cm-238/?
238.05829 		240
4.8 min
EC/ECF,3.940
Cm-240/?
240.05975 		242
7.0 min
EC,3.000 MeV
Cm-242
242.06205 		242a
600 nsec
SF,3.000 MeV
?
242.06205 		243
4.5 hr
a/EC,1.508
Am-239/Cm-243
243.06300 		244
4.35 hr
a/EC,2.260
Am-240/Cm-244
244.06516 		244a
820 nsec
SF,6.780 MeV
?
244.06516
245
4.94 da
a/EC,5.623
Am-241/Cm-245
245.06635 		246
1.80 da
a/EC,1.350
Am-242/Cm-246
246.06866 		247
1380 yr
a,5.889 MeV
Am-243
247.07029 		248
9 yr
a,5.803 MeV
Am-244
248.07311 		248a
23.7 hr
a,5.803 MeV
Am-244
248.07311 		249
320 da
a/B-/SF,8.700
Am-245/Cf-249/?
249.07497 		250
3.217 hr
B-,1.780 MeV
Cf-250
250.07830
251
55.6 min
a/B-,1.093
Am-247/Cf-251
251.08075 		MASS abund.
Halflife
Particle, Energy
Decay Product(s)
Isotopic Mass

Updated by clh on 2/6/98. This is not a publication of Phoenix College.