Periodic Table
Symbol
Cf
Group Number
3
Rank: 15 (Overall)
0
17
👆🏻
Period Number
7
Rank: 1 (Overall)
2
7
👆🏻
Block
f block
Element Family
Actinide
CAS Number
7440713
Rank: 20 (Overall)
7429905
54386242
👆🏻
Space Group Name
P63/mmc
Space Group Number
194.00
Rank: 7 (Overall)
11
276
👆🏻
Facts
Interesting Facts
- Californium metal is very harmful and highly radioactive.
- Californium metal is the heaviest metal.
Sources
Made by Bombarding Curium with Helium Ions
History
Who Discovered
Lawrence Berkeley National Laboratory
Discovery
In 1950
Abundance
Abundance In Universe
0.00 %
Rank: 38 (Overall)
0
0.11
👆🏻
Abundance In Sun
0.00 %
Rank: 30 (Overall)
0
0.1
👆🏻
Abundance In Meteorites
0.00 %
Rank: 54 (Overall)
0
22
👆🏻
Abundance In Earth's Crust
0.00 %
Rank: 62 (Overall)
1E-37
8.1
👆🏻
Abundance In Oceans
-
0
1.1
👆🏻
Abundance In Humans
0.00 %
Rank: 24 (Overall)
0
1.4
👆🏻
Uses
Uses & Benefits
- Californium metal has a very strong neutron emitter. It is used as a metal detector.
-
It also used as an identifier to check Water and oil layers in oil wells.
Industrial Uses
Chemical Industry
Medical Uses
-
Other Uses
Alloys, Nuclear Research
Biological Properties
Toxicity
Toxic
Present in Human Body
✔
✘
7% - Actinide Series Metals
In Blood
0.00 Blood/mg dm-3
Rank: 40 (Overall)
0
1970
👆🏻
In Bone
0.00 p.p.m.
Rank: 41 (Overall)
0
170000
👆🏻
Physical
Melting Point
900.00 °C
Rank: 50 (Overall)
-38.83
3410
👆🏻
Boiling Point
1,470.00 °C
Rank: 61 (Overall)
0
5660
👆🏻
Appearance
Physical State
Solid
Color
Silver
Luster
-
Hardness
Mohs Hardness
3.00
Rank: 13 (Overall)
0.2
8.5
👆🏻
Brinell Hardness
170.00 MPa
Rank: 54 (Overall)
0.14
3490
👆🏻
Vickers Hardness
1,800.00 MPa
Rank: 7 (Overall)
0
3920
👆🏻
Speed of Sound
2,260.00 m/s
Rank: 58 (Overall)
818
16200
👆🏻
Optical Properties
Refractive Index
1.30
Rank: 43 (Overall)
0.155
3.41
👆🏻
Reflectivity
63.00 %
Rank: 20 (Overall)
5
97
👆🏻
Allotropes
✔
✘
No - Actinide Series Metals has it !
α Allotropes
-
β Allotropes
-
γ Allotropes
-
Chemical
Chemical Formula
Cf
Isotopes
Known Isotopes
20
Rank: 19 (Overall)
0
38
👆🏻
Electronegativity
Pauling Electronegativity
1.30
Rank: 33 (Overall)
0
2.6
👆🏻
Sanderson Electronegativity
1.30
Rank: 25 (Overall)
0.22
2.56
👆🏻
Allred Rochow Electronegativity
1.20
Rank: 28 (Overall)
0.86
1.9
👆🏻
Mulliken-Jaffe Electronegativity
1.30
Rank: 33 (Overall)
0.62
2.48
👆🏻
Allen Electronegativity
1.30
Rank: 40 (Overall)
0.659
2.7
👆🏻
Electropositivity
Pauling Electropositivity
2.70
Rank: 22 (Overall)
1.46
3.3
👆🏻
Ionization Energies
1st Energy Level
608.00 kJ/mol
Rank: 49 (Overall)
375.7
26130
👆🏻
2nd Energy Level
1,206.00 kJ/mol
Rank: 61 (Overall)
392.8
28750
👆🏻
3rd Energy Level
2,267.00 kJ/mol
Rank: 60 (Overall)
392.8
34230
👆🏻
4th Energy Level
3,599.00 kJ/mol
Rank: 62 (Overall)
375.7
37066
👆🏻
5th Energy Level
6,080.00 kJ/mol
Rank: 43 (Overall)
392
97510
👆🏻
6th Energy Level
6,080.00 kJ/mol
Rank: 56 (Overall)
1007
105800
👆🏻
7th Energy level
6,080.00 kJ/mol
Rank: 50 (Overall)
1007
114300
👆🏻
8th Energy Level
6,080.00 kJ/mol
Rank: 47 (Overall)
730
125300
👆🏻
9th Energy Level
6,080.00 kJ/mol
Rank: 46 (Overall)
1007
134700
👆🏻
10th Energy Level
6,080.00 kJ/mol
Rank: 48 (Overall)
392
144300
👆🏻
11th Energy Level
6,080.00 kJ/mol
Rank: 53 (Overall)
392
169988
👆🏻
12th Energy Level
60,800.00 kJ/mol
Rank: 14 (Overall)
0
189368
👆🏻
13th Energy Level
6,080.00 kJ/mol
Rank: 41 (Overall)
1007
76015
👆🏻
14th Energy Level
6,080.00 kJ/mol
Rank: 30 (Overall)
380
86450
👆🏻
15th Energy Level
62,400.00 kJ/mol
Rank: 39 (Overall)
33000
100700
👆🏻
16th Energy Level
62,400.00 kJ/mol
Rank: 29 (Overall)
375.7
109480
👆🏻
17th Energy Level
608.00 kJ/mol
Rank: 51 (Overall)
375.7
122200
👆🏻
18th Energy Level
6,085.00 kJ/mol
Rank: 44 (Overall)
0
134810
👆🏻
19th Energy Level
608.00 kJ/mol
Rank: 48 (Overall)
375.7
148700
👆🏻
20th Energy Level
578.00 kJ/mol
Rank: 60 (Overall)
0
171200
👆🏻
21st Energy Level
6,080.00 kJ/mol
Rank: 16 (Overall)
375.7
179100
👆🏻
22nd Energy Level
608.00 kJ/mol
Rank: 39 (Overall)
330
184900
👆🏻
23rd Energy Level
6,080.00 kJ/mol
Rank: 17 (Overall)
357.6
198800
👆🏻
24th Energy Level
608.00 kJ/mol
Rank: 41 (Overall)
297.3
195200
👆🏻
25th Energy Level
608.00 kJ/mol
Rank: 43 (Overall)
0
121900
👆🏻
26th Energy Level
608.00 kJ/mol
Rank: 41 (Overall)
357.6
127700
👆🏻
27th Energy Level
608.00 kJ/mol
Rank: 44 (Overall)
0
133800
👆🏻
28th Energy Level
608.00 kJ/mol
Rank: 48 (Overall)
297.3
139800
👆🏻
29th Energy Level
608.00 kJ/mol
Rank: 49 (Overall)
0
148100
👆🏻
30th Energy Level
608.00 kJ/mol
Rank: 45 (Overall)
0
154500
👆🏻
Electrochemical Equivalent
3.12 g/amp-hr
Rank: 17 (Overall)
0.16812
8.3209
👆🏻
Electron Work Function
4.70 eV
Rank: 15 (Overall)
2.14
6
👆🏻
Other Chemical Properties
Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic
Atomic Number
98
Rank: 20 (Overall)
3
117
👆🏻
Electron Configuration
[Rn] 5f10 7s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
Atom
Number of Protons
98
Rank: 20 (Overall)
3
117
👆🏻
Number of Neutrons
153
Rank: 10 (Overall)
4
285
👆🏻
Number of Electrons
98
Rank: 20 (Overall)
3
117
👆🏻
Radius of an Atom
Atomic Radius
186.00 pm
Rank: 11 (Overall)
0
348
👆🏻
Covalent Radius
186.00 pm
Rank: 21 (Overall)
0
260
👆🏻
Van der Waals Radius
244.00 pm
Rank: 14 (Overall)
0
348
👆🏻
Atomic Weight
251.00 amu
Rank: 17 (Overall)
6.94
294
👆🏻
Atomic Volume
15.10 cm3/mol
Rank: 49 (Overall)
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
44.50 (-eV)
Rank: 39 (Overall)
0
392.42
👆🏻
Lattice Constant
338.00 pm
Rank: 52 (Overall)
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.58
Rank: 34 (Overall)
0.423
1.9
👆🏻
Mechanical
Density
Density At Room Temperature
15.10 g/cm3
Rank: 21 (Overall)
0.534
40.7
👆🏻
Density When Liquid (at m.p.)
15.10 g/cm3
Rank: 22 (Overall)
0.512
41
👆🏻
Tensile Strength
50.00 MPa
Rank: 38 (Overall)
0.1
11000
👆🏻
Viscosity
0.00
Rank: 25 (Overall)
1.5E-05
0.0035
👆🏻
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
Rank: 22 (Overall)
0
121
👆🏻
Vapor Pressure at 2000 K
0.00 (Pa)
Rank: 24 (Overall)
0
774
👆🏻
Elasticity properties
Shear Modulus
29.00 GPa
Rank: 29 (Overall)
1.3
222
👆🏻
Bulk Modulus
40.00 GPa
Rank: 38 (Overall)
0
462
👆🏻
Young's Modulus
0.00 GPa
Rank: 74 (Overall)
0
528
👆🏻
Poisson Ratio
0.30
Rank: 14 (Overall)
0.032
0.47
👆🏻
Other Mechanical Properties
Malleable, Sectile
Magnetic
Magnetic Characteristics
Specific Gravity
15.10
Rank: 24 (Overall)
0.53
4500
👆🏻
Magnetic Ordering
Paramagnetic
Permeability
0.00 H/m
Rank: 8 (Overall)
1.25643E-06
0.0063
👆🏻
Susceptibility
0.00
Rank: 24 (Overall)
-0.000166
200000
👆🏻
Electrical Properties
Electrical Property
-
Resistivity
6.20 nΩ·m
Rank: 60 (Overall)
0.1
961
👆🏻
Electrical Conductivity
0.11 106/cm Ω
Rank: 23 (Overall)
0
0.63
👆🏻
Electron Affinity
97.00 kJ/mol
Rank: 12 (Overall)
0
222.8
👆🏻
Thermal
Specific Heat
0.10 J/(kg K)
Rank: 44 (Overall)
0.1
3.6
👆🏻
Molar Heat Capacity
26.70 J/mol·K
Rank: 33 (Overall)
13.1
62.7
👆🏻
Thermal Conductivity
10.00 W/m·K
Rank: 68 (Overall)
0
429
👆🏻
Critical Temperature
900.00 K
Rank: 65 (Overall)
26.3
3695
👆🏻
Thermal Expansion
11.70 µm/(m·K)
Rank: 45 (Overall)
4.5
97
👆🏻
Enthalpy
Enthalpy of Vaporization
311.40 kJ/mol
Rank: 46 (Overall)
7.32
799.1
👆🏻
Enthalpy of Fusion
15.10 kJ/mol
Rank: 21 (Overall)
2.1
35.23
👆🏻
Enthalpy of Atomization
-
61.5
837
👆🏻
Standard Molar Entropy
50.00 J/mol.K
Rank: 43 (Overall)
9.5
198.1
👆🏻