Fermium

Potassium

Fermium Potassium Comparison

Fermium

Potassium

Add ⊕

1 Periodic Table

1.1 Symbol

1.2 Group Number

NA1

0 17

1.3 Period Number

2 7

1.4 Block

f block

s block

1.5 Element Family

Actinide

Alkali

1.6 CAS Number

74407247440097

7429905 54386242

1.7 Space Group Name

Not Available

Im_ 3m

1.8 Space Group Number

NA229.00

11 229

2 Facts

2.1 Interesting Facts

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

In the list of most abundant element Potassium is ranked 7th.
Potassium can easily be sliced (chopped) down using knife.

2.2 Sources

Bombarding Pu-239 with Neutrons

Found in Minerals, Mining

2.3 History

2.3.1 Who Discovered

Lawrence Berkeley National Laboratory

Humphry Davy

2.3.2 Discovery

In 1952

In 1807

2.4 Abundance

2.4.1 Abundance In Universe

NA3 * 10^-4 %

5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %~0.0004 %

1E-08 0.1

2.4.3 Abundance In Meteorites

NA0.07 %

1.7E-07 22

2.4.4 Abundance In Earth's Crust

NA1.50 %

9.9E-12 8.1

2.4.5 Abundance In Oceans

NA0.04 %

2E-23 1.1

2.4.6 Abundance In Humans

NA0.20 %

1E-13 1.4

3 Uses

3.1 Uses & Benefits

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

Potassium’s compounds are in high demand for their application in Fertilizer manufacturing.
Potassium carbonate is used in glass manufacturing and Potassium carbonate in manufacturing detergent and body wash.

3.1.1 Industrial Uses

Ammunition Industry, Chemical Industry

3.1.2 Medical Uses

Pharmaceutical Industry

3.1.3 Other Uses

3.2 Biological Properties

3.2.1 Toxicity

Unknown

Toxic

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

0.00 Blood/mg dm-31,620.00 Blood/mg dm-3

0 1970

3.2.4 In Bone

0.00 p.p.m.2,100.00 p.p.m.

0 170000

4 Physical

4.1 Melting Point

1,527.00 °C63.65 °C

27 3410

4.2 Boiling Point

NA774.00 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Unknown

Silvery Gray

4.3.3 Luster

Not Defined

4.4 Hardness

4.4.1 Mohs Hardness

NA0.40

0.2 8.5

4.4.2 Brinell Hardness

NA0.36 MPa

0.14 3490

4.4.3 Vickers Hardness

NANA

121 3430

4.5 Speed of Sound

NA2,000.00 m/s

818 16200

4.6 Optical Properties

4.6.1 Refractive Index

NANA

1.000933 1.7229

4.6.2 Reflectivity

NANA

58 97

4.7 Allotropes

✔ ✘

4.7.1 α Allotropes

Not Available

4.7.2 β Allotropes

Not Available

4.7.3 γ Allotropes

Not Available

5 Chemical

5.1 Chemical Formula

5.2 Isotopes

5.2.1 Known Isotopes

1820

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

1.300.82

0.7 2.54

5.3.2 Sanderson Electronegativity

NA0.45

0.22 2.56

5.3.3 Allred Rochow Electronegativity

1.200.91

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

NA0.73

0.62 2.48

5.3.5 Allen Electronegativity

NA0.73

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

2.703.18

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

627.00 kJ/mol418.80 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

1,225.00 kJ/mol3,052.00 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

2,363.00 kJ/mol4,420.00 kJ/mol

1600 34230

5.5.4 4th Energy Level

3,792.00 kJ/mol5,877.00 kJ/mol

2780 37066

5.5.5 5th Energy Level

NA7,975.00 kJ/mol

4305.2 97510

5.5.6 6th Energy Level

NA9,590.00 kJ/mol

5715.8 105800

5.5.7 7th Energy level

NA11,343.00 kJ/mol

7226.8 114300

5.5.8 8th Energy Level

NA14,944.00 kJ/mol

8857.4 125300

5.5.9 9th Energy Level

NA16,963.70 kJ/mol

14110 134700

5.5.10 10th Energy Level

NA48,610.00 kJ/mol

17100 144300

5.5.11 11th Energy Level

NA54,490.00 kJ/mol

19900 169988

5.5.12 12th Energy Level

NA60,730.00 kJ/mol

22219 189368

5.5.13 13th Energy Level

NA68,950.00 kJ/mol

26930 76015

5.5.14 14th Energy Level

NA75,900.00 kJ/mol

29196 86450

5.5.15 15th Energy Level

NA83,080.00 kJ/mol

41987 97510

5.5.16 16th Energy Level

NA93,400.00 kJ/mol

47206 109480

5.5.17 17th Energy Level

NA99,710.00 kJ/mol

52737 122200

5.5.18 18th Energy Level

NANA

58570 134810

5.5.19 19th Energy Level

NANA

64702 148700

5.5.20 20th Energy Level

NANA

80400 171200

5.5.21 21st Energy Level

NANA

87000 179100

5.5.22 22nd Energy Level

NANA

93400 184900

5.5.23 23rd Energy Level

NANA

98420 198800

5.5.24 24th Energy Level

NANA

104400 195200

5.5.25 25th Energy Level

NANA

121900 121900

5.5.26 26th Energy Level

NANA

127700 127700

5.5.27 27th Energy Level

NANA

133800 133800

5.5.28 28th Energy Level

NANA

139800 139800

5.5.29 29th Energy Level

NANA

148100 148100

5.5.30 30th Energy Level

NANA

154500 154500

5.6 Electrochemical Equivalent

3.20 g/amp-hr1.46 g/amp-hr

0.16812 8.3209

5.7 Electron Work Function

NA2.30 eV

2.14 5.65

5.8 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity

Chemical Stability, Flammability, Ionization, Solubility

6 Atomic

6.1 Atomic Number

10019

3 117

6.2 Electron Configuration

[Rn] 5f¹² 7s²

[Ar] 4s¹

6.3 Crystal Structure

Not Known

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

10019

3 117

6.4.2 Number of Neutrons

15720

4 184

6.4.3 Number of Electrons

10019

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

NA227.00 pm

112 265

6.5.2 Covalent Radius

NA203.00 pm

96 260

6.5.3 Van der Waals Radius

245.00 pm275.00 pm

139 348

6.6 Atomic Weight

257.00 amu39.10 amu

6.94 294

6.7 Atomic Volume

NA45.46 cm3/mol

1.39 71.07

6.8 Adjacent Atomic Numbers

6.8.1 Previous Element

6.8.2 Next Element

6.9 Valence Electron Potential

NA10.40 (-eV)

8 392.42

6.10 Lattice Constant

NA532.80 pm

228.58 891.25

6.11 Lattice Angles

π/2, π/2, π/2

6.12 Lattice C/A Ratio

NANA

1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

NA0.86 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

NA0.83 g/cm3

0.512 20

7.2 Tensile Strength

NANA

2.5 11000

7.3 Viscosity

NANA

0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

NANA

2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

NANA

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

NA1.30 GPa

1.3 222

7.5.2 Bulk Modulus

NA3.10 GPa

1.6 462

7.5.3 Young's Modulus

NA3.53 GPa

1.7 528

7.6 Poisson Ratio

NANA

0.032 0.47

7.7 Other Mechanical Properties

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

NA0.86

0.53 4500

8.1.2 Magnetic Ordering

Unknown

Paramagnetic

8.1.3 Permeability

NANA

1.25643E-06 0.0063

8.1.4 Susceptibility

NANA

-0.000166 200000

8.2 Electrical Properties

8.2.1 Electrical Property

Unknown

Conductor

8.2.2 Resistivity

NA72.00 nΩ·m

0.18 961

8.2.3 Electrical Conductivity

NA0.14 10⁶/cm Ω

0.00666 0.63

8.2.4 Electron Affinity

NA48.40 kJ/mol

0 222.8

9 Thermal

9.1 Specific Heat

NA0.75 J/(kg K)

0.11 3.6

9.2 Molar Heat Capacity

NA29.60 J/mol·K

16.443 62.7

9.3 Thermal Conductivity

NA102.50 W/m·K

6.3 429

9.4 Critical Temperature

NA2,223.00 K

26.3 3223

9.5 Thermal Expansion

NA83.30 µm/(m·K)

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

NA77.50 kJ/mol

7.32 799.1

9.6.2 Enthalpy of Fusion

NA2.32 kJ/mol

2.1 35.23

9.6.3 Enthalpy of Atomization

NA89.50 kJ/mol

61.5 837

9.7 Standard Molar Entropy

NA64.70 J/mol.K

9.5 198.1

Compare Actinide Series » More

Fermium vs Actinium

Fermium vs Einsteinium

Fermium vs Neptunium

» More

More Compare Actinide Series

Actinide Metals » More

» More

More Actinide Metals