Neptunium

Cobalt

Neptunium Cobalt Comparison

Neptunium

Cobalt

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1 Periodic Table

1.1 Symbol

1.2 Group Number

NA9

0 17

1.3 Period Number

2 7

1.4 Block

f block

d block

1.5 Element Family

Actinide

Transition Metal

1.6 CAS Number

74399987440484

7429905 54386242

1.7 Space Group Name

Pnma

P63/mmc

1.8 Space Group Number

62.00194.00

11 229

2 Facts

2.1 Interesting Facts

Not Available

The main source of Cobalt is as a by-product of copper and nickel metal mining.
Cobalt metal can be obtained from other elements like Oxygen, Sulfur and Arsenic.

It s also used in electroplating process as it exhibits anti cession properties.

2.2 Sources

Made by Bombarding Uranium with Neutrons, Ores of metals

Found in Compounds, Mining, Ores of Minerals

2.3 History

2.3.1 Who Discovered

Edwin McMillan and Philip H. Abelson

Georg Brandt

2.3.2 Discovery

In 1940

In 1732

2.4 Abundance

2.4.1 Abundance In Universe

NA3 * 10^-4 %

5E-09 0.11

2.4.3 Abundance In Sun

~-9999 %~0.0004 %

1E-08 0.1

2.4.5 Abundance In Meteorites

NA0.06 %

1.7E-07 22

2.4.7 Abundance In Earth's Crust

NA0.00 %

9.9E-12 8.1

2.4.9 Abundance In Oceans

NA0.00 %

2E-23 1.1

2.4.12 Abundance In Humans

NA0.00 %

1E-13 1.4

3 Uses

3.1 Uses & Benefits

Currently known uses of Neptunium metal are limited to research purpose only.
Neptunium’s isotope neptunium-237 is used as a neutron detectors.

Its alloys with aluminum and nickel are used to make powerful magnets.
Few other alloys exhibit high-temperature strength and hence they are used in Turbines of Jet and Gas engine.

3.1.1 Industrial Uses

Chemical Industry, Electrical Industry, Electronic Industry

3.1.2 Medical Uses

Pharmaceutical Industry

3.1.3 Other Uses

Alloys, Nuclear Research, Research Purposes

Alloys

3.2 Biological Properties

3.2.1 Toxicity

Toxic

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

0.00 Blood/mg dm-30.04 Blood/mg dm-3

0 1970

3.2.6 In Bone

0.00 p.p.m.0.04 p.p.m.

0 170000

4 Physical

4.1 Melting Point

640.00 °C1,495.00 °C

27 3410

4.2 Boiling Point

3,902.00 °C2,870.00 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Silver

Gray

4.3.3 Luster

Metallic

4.4 Hardness

4.4.1 Mohs Hardness

NA5.00

0.2 8.5

4.5.1 Brinell Hardness

NA470.00 MPa

0.14 3490

4.6.1 Vickers Hardness

NA1,043.00 MPa

121 3430

5.2 Speed of Sound

NA4,720.00 m/s

818 16200

5.6 Optical Properties

5.6.1 Refractive Index

NANA

1.000933 1.7229

5.6.2 Reflectivity

NA67.00 %

58 97

5.7 Allotropes

✔ ✘

5.7.1 α Allotropes

Not Available

α-Cobalt

5.7.2 β Allotropes

Not Available

β-Cobalt

5.7.3 γ Allotropes

Not Available

6 Chemical

6.1 Chemical Formula

6.2 Isotopes

6.2.1 Known Isotopes

2026

0 38

6.3 Electronegativity

6.3.1 Pauling Electronegativity

1.361.88

0.7 2.54

6.4.2 Sanderson Electronegativity

NA2.56

0.22 2.56

6.4.4 Allred Rochow Electronegativity

1.221.70

0.86 1.82

6.4.6 Mulliken-Jaffe Electronegativity

NANA

0.62 2.48

6.5.1 Allen Electronegativity

NA1.84

0.659 2.7

6.7 Electropositivity

6.7.1 Pauling Electropositivity

2.642.12

1.46 3.3

6.8 Ionization Energies

6.8.1 1st Energy Level

604.50 kJ/mol760.40 kJ/mol

375.7 26130

6.10.1 2nd Energy Level

1,128.00 kJ/mol1,648.00 kJ/mol

710.2162 28750

6.11.1 3rd Energy Level

1,997.00 kJ/mol3,232.00 kJ/mol

1600 34230

7.1.2 4th Energy Level

3,242.00 kJ/mol4,950.00 kJ/mol

2780 37066

7.1.4 5th Energy Level

NA7,670.00 kJ/mol

4305.2 97510

7.2.1 6th Energy Level

NA9,840.00 kJ/mol

5715.8 105800

7.4.2 7th Energy level

NA12,440.00 kJ/mol

7226.8 114300

7.5.2 8th Energy Level

NA15,230.00 kJ/mol

8857.4 125300

7.5.4 9th Energy Level

NA17,959.00 kJ/mol

14110 134700

7.5.6 10th Energy Level

NA26,570.00 kJ/mol

17100 144300

7.6.1 11th Energy Level

NA29,400.00 kJ/mol

19900 169988

8.1.4 12th Energy Level

NA32,400.00 kJ/mol

22219 189368

8.1.6 13th Energy Level

NA36,600.00 kJ/mol

26930 76015

8.2.3 14th Energy Level

NA39,700.00 kJ/mol

29196 86450

8.2.6 15th Energy Level

NA42,800.00 kJ/mol

41987 97510

9.1.1 16th Energy Level

NA49,396.00 kJ/mol

47206 109480

9.2.1 17th Energy Level

NA52,737.00 kJ/mol

52737 122200

9.3.1 18th Energy Level

NA134,810.00 kJ/mol

58570 134810

9.4.1 19th Energy Level

NA145,170.00 kJ/mol

64702 148700

9.6.2 20th Energy Level

NA154,700.00 kJ/mol

80400 171200

9.6.3 21st Energy Level

NA167,400.00 kJ/mol

87000 179100

9.6.5 22nd Energy Level

NA178,100.00 kJ/mol

93400 184900

9.6.7 23rd Energy Level

NA189,300.00 kJ/mol

98420 198800

9.7.1 24th Energy Level

NANA

104400 195200

9.7.2 25th Energy Level

NANA

121900 121900

9.7.3 26th Energy Level

NANA

127700 127700

9.7.4 27th Energy Level

NANA

133800 133800

9.7.5 28th Energy Level

NANA

139800 139800

9.7.6 29th Energy Level

NANA

148100 148100

9.7.7 30th Energy Level

NANA

154500 154500

9.8 Electrochemical Equivalent

1.77 g/amp-hr1.10 g/amp-hr

0.16812 8.3209

9.9 Electron Work Function

NA5.00 eV

2.14 5.65

9.10 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity, Solubility

Chemical Stability, Ionization

10 Atomic

10.1 Atomic Number

9322

3 117

10.2 Electron Configuration

[Rn] 5f⁴ 6d¹ 7s²

[Ar] 3d² 4s²

10.3 Crystal Structure

Orthorhombic (ORTH)

Hexagonal Close Packed (HCP)

10.3.1 Crystal Lattice

10.4 Atom

10.4.1 Number of Protons

9322

3 117

10.4.2 Number of Neutrons

14426

4 184

10.4.3 Number of Electrons

9322

3 117

10.5 Radius of an Atom

10.5.1 Atomic Radius

155.00 pm147.00 pm

112 265

10.5.2 Covalent Radius

190.00 pm160.00 pm

96 260

10.5.3 Van der Waals Radius

221.00 pm200.00 pm

139 348

10.6 Atomic Weight

237.00 amu47.87 amu

6.94 294

1.3 Atomic Volume

11.62 cm3/mol10.64 cm3/mol

1.39 71.07

1.5 Adjacent Atomic Numbers

1.5.1 Previous Element

1.5.2 Next Element

1.6 Valence Electron Potential

96.00 (-eV)95.20 (-eV)

8 392.42

1.7 Lattice Constant

666.30 pm295.08 pm

228.58 891.25

1.8 Lattice Angles

π/2, π/2, π/2

π/2, π/2, 2 π/3

1.9 Lattice C/A Ratio

NANA

1.567 1.886

2 Mechanical

2.1 Density

2.1.1 Density At Room Temperature

19.38 g/cm³4.51 g/cm³

0.534 40.7

2.1.3 Density When Liquid (at m.p.)

NA4.11 g/cm3

0.512 20

2.2 Tensile Strength

125.00 MPa434.00 MPa

2.5 11000

2.3 Viscosity

NANA

0.001526 0.001526

2.5 Vapor Pressure

2.5.1 Vapor Pressure at 1000 K

NANA

2.47E-11 121

2.6.2 Vapor Pressure at 2000 K

0.11 (Pa)0.98 (Pa)

2.62E-10 774

2.7 Elasticity properties

2.7.1 Shear Modulus

NA44.00 GPa

1.3 222

2.7.3 Bulk Modulus

NA110.00 GPa

1.6 462

2.7.4 Young's Modulus

NA116.00 GPa

1.7 528

2.8 Poisson Ratio

NA0.32

0.032 0.47

2.9 Other Mechanical Properties

Ductile

3 Magnetic

3.1 Magnetic Characteristics

3.1.1 Specific Gravity

20.254,500.00

0.53 4500

3.1.3 Magnetic Ordering

Paramagnetic

3.1.4 Permeability

NANA

1.25643E-06 0.0063

3.1.6 Susceptibility

NANA

-0.000166 200000

3.2 Electrical Properties

3.2.1 Electrical Property

Conductor

Poor Conductor

3.2.2 Resistivity

1.22 nΩ·m420.00 nΩ·m

0.18 961

3.2.5 Electrical Conductivity

0.01 10⁶/cm Ω0.02 10⁶/cm Ω

0.00666 0.63

3.2.7 Electron Affinity

NA7.60 kJ/mol

0 222.8

4 Thermal

4.1 Specific Heat

0.12 J/(kg K)0.52 J/(kg K)

0.11 3.6

4.2 Molar Heat Capacity

29.46 J/mol·K25.06 J/mol·K

16.443 62.7

4.3 Thermal Conductivity

6.30 W/m·K21.90 W/m·K

6.3 429

4.4 Critical Temperature

NANA

26.3 3223

4.5 Thermal Expansion

NA8.60 µm/(m·K)

4.5 97

4.6 Enthalpy

4.6.1 Enthalpy of Vaporization

NA429.00 kJ/mol

7.32 799.1

4.6.3 Enthalpy of Fusion

3.20 kJ/mol15.48 kJ/mol

2.1 35.23

4.6.5 Enthalpy of Atomization

NA468.60 kJ/mol

61.5 837

4.7 Standard Molar Entropy

NA27.30 J/mol.K

9.5 198.1

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