Template:Infobox berkelium

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[[Category:Template:Pagetype with short description]]

Berkelium, 97Bk
Berkelium metal.jpg
Berkelium
Pronunciation
Appearancesilvery
Mass number[247]
Berkelium in the periodic table
Template:Periodic table (32 columns, micro) Tb

Bk

(Upu)
curiumberkeliumcalifornium
Atomic number (Z)97
Groupn/a
Periodperiod 7
Block  f-block
Electron configuration[Rn] 5f9 7s2
Electrons per shell2, 8, 18, 32, 27, 8, 2
Physical properties
Phase at STPsolid
Melting pointbeta: 1259 K ​(986 °C, ​1807 °F)
Boiling pointbeta: 2900 K ​(2627 °C, ​4760 °F)
Density (near r.t.)alpha: 14.78 g/cm3
beta: 13.25 g/cm3
Heat of fusion7.92 kJ/mol (calculated)
Atomic properties
Oxidation states+2, +3, +4, +5[1]
ElectronegativityPauling scale: 1.3
Ionization energies
  • 1st: 601 kJ/mol
Atomic radiusempirical: 170 pm
Color lines in a spectral range
Spectral lines of berkelium
Other properties
Natural occurrencesynthetic
Crystal structuredouble hexagonal close-packed (dhcp)
Double hexagonal close packed crystal structure for berkelium
Thermal conductivity10 W/(m·K)
Magnetic orderingparamagnetic
CAS Number7440-40-6
History
Namingafter Berkeley, California, where it was discovered
DiscoveryLawrence Berkeley National Laboratory (1949)
Main isotopes of berkelium
[[Isotope|IsoTemplate:Shytope]] [[Natural abundance|AbunTemplate:Shydance]] Half-life (t1/2) Decay mode [[Decay product|ProTemplate:Shyduct]]
245Bk syn 4.94 d ε 245Cm
α 241Am
246Bk syn 1.8 d α 242Am
ε 246Cm
247Bk syn 1380 y α 243Am
248Bk syn >300 y[2] α 244Am
249Bk syn 330 d α 245Am
SF
β 249Cf
Category Category: Berkelium
| references

[[Category:Infobox templates|Template:Remove first word]]

data m.p. cat
in calc from C diff report ref
C 986
K 1259 1259 0
F 1807 1807 0 Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 986, K: beta: 1259, F: 1807
comment
data b.p. cat
in calc from C diff report ref
C 2627
K 2900 2900 0
F 4760 4761 -1 delta Template:Subpage other
max precision 0
WD Template:Wikidata Script error: No such module "EditAtWikidata". Template:Wikidata
input C: 2627, K: beta: 2900, F: 4760
comment
Cm ←

i'box Cm

iso
97
Bk (E)
→ Cf

i'box Cf

  Data sets read by {{Infobox element}}
Name and identifiers
Top image (caption, alt)
Pronunciation
Category (enwiki)
Standard atomic weight
  most stable isotope
Natural occurrence
Phase at STP
Oxidation states
Spectral lines image
Electron configuration (cmt, ref)
Term symbol * (cmt, ref)
Wikidata *
* Not used in {{Infobox element}} (2019-02-03)
See also {{Infobox element/symbol-to--navbox}}

References

  1. Kovács, Attila; Dau, Phuong D.; Marçalo, Joaquim; Gibson, John K. (2018). "Pentavalent Curium, Berkelium, and Californium in Nitrate Complexes: Extending Actinide Chemistry and Oxidation States". Inorg. Chem. American Chemical Society. 57 (15): 9453–9467. doi:10.1021/acs.inorgchem.8b01450. PMID 30040397.
  2. Milsted, J.; Friedman, A. M.; Stevens, C. M. (1965). "The alpha half-life of berkelium-247; a new long-lived isomer of berkelium-248". Nuclear Physics. 71 (2): 299. Bibcode:1965NucPh..71..299M. doi:10.1016/0029-5582(65)90719-4.

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