Potassium

Mendelevium

Potassium Mendelevium Comparison

Potassium

Mendelevium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

1NA

0 17

1.3 Period Number

2 7

1.4 Block

s block

f block

1.5 Element Family

Alkali

Actinide

1.6 CAS Number

74400977440111

7429905 54386242

1.7 Space Group Name

Im_ 3m

Not Available

1.8 Space Group Number

229.00NA

11 229

2 Facts

2.1 Interesting Facts

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

Mendelevium metal is synthetically produced metal.
Mendelevium metal has been produced in only trace amount.

2.2 Sources

Found in Minerals, Mining

Bombarding Einsteinium with Helium Ions

2.3 History

2.3.1 Who Discovered

Humphry Davy

Lawrence Berkeley National Laboratory

2.3.2 Discovery

In 1807

In 1955

2.4 Abundance

2.4.1 Abundance In Universe

3 * 10^-4 %NA

5E-09 0.11

2.4.2 Abundance In Sun

~0.0004 %~-9999 %

1E-08 0.1

2.4.3 Abundance In Meteorites

0.07 %NA

1.7E-07 22

2.4.4 Abundance In Earth's Crust

1.50 %NA

9.9E-12 8.1

2.4.5 Abundance In Oceans

0.04 %NA

2E-23 1.1

2.4.6 Abundance In Humans

0.20 %NA

1E-13 1.4

3 Uses

3.1 Uses & Benefits

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.

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

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

Toxic

Unknown

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

1,620.00 Blood/mg dm-30.00 Blood/mg dm-3

0 1970

3.2.4 In Bone

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

0 170000

4 Physical

4.1 Melting Point

63.65 °C827.00 °C

27 3410

4.2 Boiling Point

774.00 °CNA

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silvery Gray

Unknown

4.3.3 Luster

Metallic

4.4 Hardness

4.4.1 Mohs Hardness

0.40NA

0.2 8.5

4.4.2 Brinell Hardness

0.36 MPaNA

0.14 3490

4.4.3 Vickers Hardness

NANA

121 3430

4.5 Speed of Sound

2,000.00 m/sNA

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

2016

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

0.821.30

0.7 2.54

5.3.2 Sanderson Electronegativity

0.45NA

0.22 2.56

5.3.3 Allred Rochow Electronegativity

0.911.20

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

0.73NA

0.62 2.48

5.3.5 Allen Electronegativity

0.73NA

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

3.182.70

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

418.80 kJ/mol635.00 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

3,052.00 kJ/mol1,235.00 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

4,420.00 kJ/mol2,470.00 kJ/mol

1600 34230

5.5.4 4th Energy Level

5,877.00 kJ/mol3,840.00 kJ/mol

2780 37066

5.5.5 5th Energy Level

7,975.00 kJ/molNA

4305.2 97510

5.5.6 6th Energy Level

9,590.00 kJ/molNA

5715.8 105800

5.5.7 7th Energy level

11,343.00 kJ/molNA

7226.8 114300

5.5.8 8th Energy Level

14,944.00 kJ/molNA

8857.4 125300

5.5.9 9th Energy Level

16,963.70 kJ/molNA

14110 134700

5.5.10 10th Energy Level

48,610.00 kJ/molNA

17100 144300

5.5.11 11th Energy Level

54,490.00 kJ/molNA

19900 169988

5.5.12 12th Energy Level

60,730.00 kJ/molNA

22219 189368

5.5.13 13th Energy Level

68,950.00 kJ/molNA

26930 76015

5.5.14 14th Energy Level

75,900.00 kJ/molNA

29196 86450

5.5.15 15th Energy Level

83,080.00 kJ/molNA

41987 97510

5.5.16 16th Energy Level

93,400.00 kJ/molNA

47206 109480

5.5.17 17th Energy Level

99,710.00 kJ/molNA

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

1.46 g/amp-hr3.21 g/amp-hr

0.16812 8.3209

5.7 Electron Work Function

2.30 eVNA

2.14 5.65

5.8 Other Chemical Properties

Chemical Stability, Flammability, Ionization, Solubility

Ionization, Radioactive Isotopes, Radioactivity

6 Atomic

6.1 Atomic Number

19101

3 117

6.2 Electron Configuration

[Ar] 4s¹

[Rn] 5f¹³ 7s²

6.3 Crystal Structure

Body Centered Cubic (BCC)

Not Known

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

19101

3 117

6.4.2 Number of Neutrons

20157

4 184

6.4.3 Number of Electrons

19101

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

227.00 pmNA

112 265

6.5.2 Covalent Radius

203.00 pmNA

96 260

1.4.2 Van der Waals Radius

275.00 pm246.00 pm

139 348

1.5 Atomic Weight

39.10 amu258.00 amu

6.94 294

1.6 Atomic Volume

45.46 cm3/molNA

1.39 71.07

1.7 Adjacent Atomic Numbers

1.7.1 Previous Element

1.7.2 Next Element

1.8 Valence Electron Potential

10.40 (-eV)NA

8 392.42

1.9 Lattice Constant

532.80 pmNA

228.58 891.25

1.10 Lattice Angles

π/2, π/2, π/2

1.11 Lattice C/A Ratio

NANA

1.567 1.886

2 Mechanical

2.1 Density

2.1.1 Density At Room Temperature

0.86 g/cm³NA

0.534 40.7

2.1.2 Density When Liquid (at m.p.)

0.83 g/cm3NA

0.512 20

2.2 Tensile Strength

NANA

2.5 11000

2.3 Viscosity

NANA

0.001526 0.001526

2.4 Vapor Pressure

2.4.1 Vapor Pressure at 1000 K

NANA

2.47E-11 121

2.4.2 Vapor Pressure at 2000 K

NANA

2.62E-10 774

2.5 Elasticity properties

2.5.1 Shear Modulus

1.30 GPaNA

1.3 222

2.5.2 Bulk Modulus

3.10 GPaNA

1.6 462

2.5.3 Young's Modulus

3.53 GPaNA

1.7 528

2.6 Poisson Ratio

NANA

0.032 0.47

2.7 Other Mechanical Properties

Unknown

3 Magnetic

3.1 Magnetic Characteristics

3.1.1 Specific Gravity

0.86NA

0.53 4500

3.1.2 Magnetic Ordering

Paramagnetic

Unknown

3.1.3 Permeability

NANA

1.25643E-06 0.0063

3.1.4 Susceptibility

NANA

-0.000166 200000

3.2 Electrical Properties

3.2.1 Electrical Property

Conductor

Unknown

3.2.2 Resistivity

72.00 nΩ·mNA

0.18 961

3.2.3 Electrical Conductivity

0.14 10⁶/cm ΩNA

0.00666 0.63

3.2.4 Electron Affinity

48.40 kJ/molNA

0 222.8

4 Thermal

4.1 Specific Heat

0.75 J/(kg K)NA

0.11 3.6

4.2 Molar Heat Capacity

29.60 J/mol·KNA

16.443 62.7

4.3 Thermal Conductivity

102.50 W/m·KNA

6.3 429

4.4 Critical Temperature

2,223.00 KNA

26.3 3223

4.5 Thermal Expansion

83.30 µm/(m·K)NA

4.5 97

4.6 Enthalpy

4.6.1 Enthalpy of Vaporization

77.50 kJ/molNA

7.32 799.1

4.6.2 Enthalpy of Fusion

2.32 kJ/molNA

2.1 35.23

4.6.3 Enthalpy of Atomization

89.50 kJ/molNA

61.5 837

4.7 Standard Molar Entropy

64.70 J/mol.KNA

9.5 198.1

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