CALIFORNIUM, Cf (98)
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ATOMIC ARCHITECTURE
CALIFORNIUM
Cf (98)
ˌkælɪˈfɔːniəm
PHONETICS
Californium is made by bombarding curium with alpha particles (helium-4 ions). Two crystalline forms exist under normal pressure: one above and one below 900 °C (1,650 °F) and a third form exists at high pressure. The most stable isotope is californium-251, with a half-life of 898 years.
ELEMENT BRIEF
1950 by Glenn T. Seaborg, Stanley G. Thompson, Albert Ghiorso and Kenneth Street, USA.
DISCOVERY
From the name of the State and University of California, USA.
ETYMOLOGY
Californium
ELEMENT
Cf
SYMBOL
98
ATOMIC NUMBER
7440-71-3
CAS NUMBER

ELEMENTAL SPECTRUM
Silver
ELEMENTAL COLOUR
-
REFRACTIVE INDEX
-
POISSON RATIO
16.595 cm³
MOLAR VOLUME
-
BRINELL HARDNESS
-
MOHS HARDNESS
-
VICKERS HARDNESS
-
SPEED OF SOUND
-
BULK MODULUS
-
SHEAR MODULUS
-
YOUNG MODULUS
ALLOTROPES
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1,173.15 K, 900.00 °C
MELTING POINT
-
BOILING POINT
-
AUTOMATIC IGNITION
-
FLASHPOINT
-
CRITICAL TEMPERATURE
-
CRITICAL PRESSURE
10.000'000 W/(m K)
THERMAL CONDUCTIVITY
-
THERMAL EXPANSION
-
SPECIFIC HEAT
-
HEAT FUSION
-
HEAT VAPORISATION
-
HEAT COMBUSTION
-
CURIE POINT
-
NEEL POINT
-
ADIABATIC INDEX
Solid
PHASE
-
ELECTRICAL TYPE
-
CONDUCTIVITY
-
RESISTIVITY
-
SUPERCONDUCTING POINT
-
MAGNETIC TYPE
-
MASS SUSCEPTIBILITY
-
MOLAR SUSCEPTIBILITY
-
VOLUME SUSCEPTIBILITY
Actinide
CLASSIFICATION
250.578'119'0
ATOMIC WEIGHT
-
ATOMIC RADIUS
168 pm
COVALENT RADIUS SINGLE BOND
140 pm
COVALENT RADIUS DOUBLE BOND
-
COVALENT RADIUS TRIPLE BOND
245 pm
VAN DER WAALS RADIUS
[Rn]7s²5f¹⁰
ELECTRON CONFIGURATION
Hexagonal, Close Packed Double
CRYSTAL STRUCTURE
15.100'00 g/cm³
DENSITY AS SOLID
-
DENSITY AS LIQUID
-
DENSITY AS GAS
p6₃/mmc
SPACE GROUP NAME
194
SPACE GROUP NUMBER
π/2, π/2 2π/3
LATTICE ANGLES
338, 338 1102.5 pm
LATTICE CONSTANTS
4
VALENCE
1.3
ELECTRONEGATIVITY
-
ELECTRON AFFINITY
IONISATION ENERGY
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-
UNIVERSE
-
METEORITES
-
SUN
-
EARTH CRUST
-
OCEANS
-
HUMANS
901 Years
HALF LIFE
1,300 years
LIFETIME
5f¹⁰ = 5, 3, -1, -1/2
QUANTUM NUMBERS
-
NEUTRON CROSS SECTION
-
NEUTRON MASS ABSORPTION
STABLE ISOTOPES
NONE
UNSTABLE ISOTOPES
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ISOTOPIC CHAIN
CENTRALDATACORE
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