What is Fermium?

Fermium

Periodic Table

Symbol

Group Number

3 15

Period Number

7 1

Block

f block

Element Family

Actinide

CAS Number

7440724 19

Space Group Name

Space Group Number

194.00 7

Facts

Interesting Facts

Fermium metal is highly radioactive in nature.
Fermium is synthetically produced metal.

Sources

Bombarding Pu-239 with Neutrons

History

Who Discovered

Lawrence Berkeley National Laboratory

Discovery

In 1952

Abundance

Abundance In Universe

0.00 % 35

Abundance In Sun

0.00 % 30

Abundance In Meteorites

0.00 % 54

Abundance In Earth's Crust

0.00 % 60

Abundance In Oceans

Abundance In Humans

Uses

Uses & Benefits

Currently known uses of Fermium metal are limited to research purpose only.

Industrial Uses

Medical Uses

Other Uses

Biological Properties

Toxicity

Present in Human Body

In Blood

0.00 Blood/mg dm-3 40

In Bone

0.00 p.p.m. 41

Physical

Melting Point

1,527.00 °C 26

Boiling Point

0.00 °C 82

Appearance

Physical State

Solid

Color

Luster

Hardness

Mohs Hardness

6.00 6

Brinell Hardness

500.00 MPa 28

Vickers Hardness

600.00 MPa 28

Speed of Sound

2,500.00 m/s 51

Optical Properties

Refractive Index

1.30 43

Reflectivity

59.00 % 24

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

18 21

Electronegativity

Pauling Electronegativity

1.30 33

Sanderson Electronegativity

1.30 25

Allred Rochow Electronegativity

1.20 28

Mulliken-Jaffe Electronegativity

1.30 33

Allen Electronegativity

1.30 40

Electropositivity

Pauling Electropositivity

2.70 22

Ionization Energies

1st Energy Level

627.00 kJ/mol 47

2nd Energy Level

1,225.00 kJ/mol 59

3rd Energy Level

2,363.00 kJ/mol 55

4th Energy Level

3,792.00 kJ/mol 56

5th Energy Level

6,270.00 kJ/mol 39

6th Energy Level

6,270.00 kJ/mol 53

7th Energy level

6,270.00 kJ/mol 47

8th Energy Level

6,270.00 kJ/mol 45

9th Energy Level

7,040.00 kJ/mol 33

10th Energy Level

6,270.00 kJ/mol 43

11th Energy Level

6,270.00 kJ/mol 47

12th Energy Level

62,700.00 kJ/mol 10

13th Energy Level

6,270.00 kJ/mol 38

14th Energy Level

6,270.00 kJ/mol 27

15th Energy Level

62,700.00 kJ/mol 38

16th Energy Level

62,700.00 kJ/mol 28

17th Energy Level

627.00 kJ/mol 49

18th Energy Level

6,270.00 kJ/mol 40

19th Energy Level

994.80 kJ/mol 21

20th Energy Level

627.00 kJ/mol 42

21st Energy Level

627.00 kJ/mol 60

22nd Energy Level

345.00 kJ/mol 82

23rd Energy Level

6,270.00 kJ/mol 14

24th Energy Level

627.60 kJ/mol 38

25th Energy Level

627.00 kJ/mol 40

26th Energy Level

627.60 kJ/mol 39

27th Energy Level

627.60 kJ/mol 41

28th Energy Level

627.60 kJ/mol 46

29th Energy Level

627.60 kJ/mol 47

30th Energy Level

627.60 kJ/mol 42

Electrochemical Equivalent

3.20 g/amp-hr 15

Electron Work Function

4.47 eV 21

Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity

Atomic

Atomic Number

100 18

Electron Configuration

[Rn] 5f¹² 7s²

Crystal Structure

Not Known

Crystal Lattice

Unknown-Crystal-Structure-of-Fermium.jpg#100

Atom

Number of Protons

100 18

Number of Neutrons

157 8

Number of Electrons

100 18

Radius of an Atom

Atomic Radius

180.00 pm 16

Covalent Radius

180.00 pm 23

Van der Waals Radius

245.00 pm 13

Atomic Weight

257.00 amu 15

Atomic Volume

18.00 cm3/mol 41

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

0.00 (-eV) 78

Lattice Constant

350.00 pm 48

Lattice Angles

Lattice C/A Ratio

1.63 13

Mechanical

Density

Density At Room Temperature

9.70 g/cm³ 44

Density When Liquid (at m.p.)

9.70 g/cm3 43

Tensile Strength

0.10 MPa 52

Viscosity

0.00 25

Vapor Pressure

Vapor Pressure at 1000 K

0.00 (Pa) 22

Vapor Pressure at 2000 K

0.00 (Pa) 30

Elasticity properties

Shear Modulus

30.00 GPa 27

Bulk Modulus

50.00 GPa 24

Young's Modulus

0.00 GPa 74

Poisson Ratio

0.35 9

Other Mechanical Properties

Magnetic

Magnetic Characteristics

Specific Gravity

9.70 45

Magnetic Ordering

Permeability

0.00 H/m 16

Susceptibility

0.00 24

Electrical Properties

Electrical Property

Resistivity

7.90 nΩ·m 55

Electrical Conductivity

0.00 10⁶/cm Ω 71

Electron Affinity

0.00 kJ/mol 49

Thermal

Specific Heat

0.10 J/(kg K) 44

Molar Heat Capacity

27.00 J/mol·K 29

Thermal Conductivity

0.00 W/m·K 80

Critical Temperature

1,323.00 K 47

Thermal Expansion

11.00 µm/(m·K) 49

Enthalpy

Enthalpy of Vaporization

319.20 kJ/mol 44

Enthalpy of Fusion

13.30 kJ/mol 30

Enthalpy of Atomization

Standard Molar Entropy

50.00 J/mol.K 43

Periodic Table >>

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