Californyo

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Californium
98Cf
Dy

Cf

(Upn)
berkeliumcaliforniumeinsteinium
Appearance
silvery
A very small disc of silvery metal, magnified to show its metallic texture
General properties
Name, simbolo, kaiphan californium, Cf, 98
Pronunciation Plantilya:IPAc-en
Plantilya:Respell
Element category aktinido
Group, period, block [[group {{{group}}} element|{{{group}}}]], 7, f
Standard atomic weight (251) Plantilya:Sfn
Electron configuration [Rn] 5f10 7s2 Plantilya:Sfn
2, 8, 18, 32, 28, 8, 2
Electron shells of californium (2, 8, 18, 32, 28, 8, 2)
History
Discovery Lawrence Berkeley National Laboratory (1950)
Physical properties
Phase magahi
Density (near r.t.) 15.1Plantilya:Sfn g·cm−3
Melting point 1173 K, 900 Plantilya:Sfn °C, 1652 °F
Boiling point 1743[1] K, 1470 °C, 2678 (estimation) °F
Atomic properties
Oxidation states 2, 3, 4 Plantilya:Sfn
Electronegativity 1.3 Plantilya:Sfn (Pauling scale)
Ionization energies 1st: 608 Plantilya:Sfn kJ·mol−1
Miscellanea
Crystal structure simple hexagonal
Californium has a simple hexagonal crystal structure
Mohs hardness 3–4Plantilya:Sfn
CAS registry number 7440-71-3 Plantilya:Sfn
Most stable isotopes
Main article: Isotopes of californium
iso NA half-life DM DE (MeV) DP
248Cf syn 333.5 d α (100%) 6.369 244Cm
SF (2.9×10−3%) 0.0029
249Cf trace 351 y α (100%) 6.295 245Cm
SF (5.0×10−7%) 4.4×10−7
250Cf trace 13.08 y α (99.92%) 6.129 246Cm
SF (0.08%) 0.077
251Cf trace 898 y α 6.172 247Cm
252Cf trace 2.645 y α (96.91%) 6.217 248Cm
SF (3.09%)
253Cf trace 17.81 d β (99.69%) 0.29 253Es
α (0.31%) 6.126 249Cm
254Cf syn 60.5 d SF (99.69%)
α (0.31%) 5.930 250Cm
Isotope references: Plantilya:Sfn[2]
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Ang californyo (Iningles californium) mao ang elementong kimiko sa talaang peryodiko nga may simbolo nga Cf ug kaiphan nga atomik 98. Ang californyo mao ang aktinido.

Ang mga gi basihan niini[usba | edit source]

  1. Joseph Jacob Katz; Glenn Theodore Seaborg; Lester R. Morss (1986). The Chemistry of the actinide elements, Chapman and Hall. p. 1038. ISBN 9780412273704, http://books.google.com/books?id=UuPvAAAAMAAJ. Gikuha sa 11 Hulyo 2011. 
  2. NNDC contributors (2008). Sonzogni, Alejandro A. (Database Manager):Chart of Nuclides. National Nuclear Data Center, Brookhaven National Laboratory. Retrieved on 2010-03-01.


Galeriya sa hulagway[usba | edit source]