Meitnerium

Neptunium

Meitnerium Neptunium Comparison

Meitnerium

Neptunium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

9NA

0 17

1.3 Period Number

2 7

1.4 Block

d block

f block

1.5 Element Family

Probably Transition

Actinide

1.6 CAS Number

540380167439998

7429905 54386242

1.7 Space Group Name

Not Available

Pnma

1.8 Space Group Number

NA62.00

11 229

2 Facts

2.1 Interesting Facts

Not Available

2.2 Sources

Bombarding Bi209 with Accelerated Nuclei of Fe58, Synthetically Produced

Made by Bombarding Uranium with Neutrons, Ores of metals

2.3 History

2.3.1 Who Discovered

Gesellschaft für Schwerionenforschung

Edwin McMillan and Philip H. Abelson

2.3.2 Discovery

In 1982

In 1940

2.4 Abundance

2.4.1 Abundance In Universe

NANA

5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %~-9999 %

1E-08 0.1

2.4.3 Abundance In Meteorites

NANA

1.7E-07 22

2.4.4 Abundance In Earth's Crust

NANA

9.9E-12 8.1

2.4.5 Abundance In Oceans

NANA

2E-23 1.1

2.4.6 Abundance In Humans

NANA

1E-13 1.4

3 Uses

3.1 Uses & Benefits

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

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

3.1.1 Industrial Uses

3.1.2 Medical Uses

3.1.3 Other Uses

Alloys, Nuclear Research, Research Purposes

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-30.00 Blood/mg dm-3

0 1970

3.2.4 In Bone

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

0 170000

4 Physical

4.1 Melting Point

NA640.00 °C

27 3410

4.2 Boiling Point

NA3,902.00 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Unknown

Silver

4.3.3 Luster

Unknown Luster

Metallic

4.4 Hardness

4.4.1 Mohs Hardness

NANA

0.2 8.5

4.4.2 Brinell Hardness

NANA

0.14 3490

4.4.3 Vickers Hardness

NANA

121 3430

4.5 Speed of Sound

NANA

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

420

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

NA1.36

0.7 2.54

5.3.2 Sanderson Electronegativity

NANA

0.22 2.56

5.3.3 Allred Rochow Electronegativity

NA1.22

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

NANA

0.62 2.48

5.3.5 Allen Electronegativity

NANA

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

NA2.64

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

800.80 kJ/mol604.50 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

1,823.60 kJ/mol1,128.00 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

2,904.20 kJ/mol1,997.00 kJ/mol

1600 34230

5.5.4 4th Energy Level

3,859.40 kJ/mol3,242.00 kJ/mol

2780 37066

5.5.5 5th Energy Level

4,920.80 kJ/molNA

4305.2 97510

5.5.6 6th Energy Level

NANA

5715.8 105800

5.5.7 7th Energy level

NANA

7226.8 114300

5.5.8 8th Energy Level

NANA

8857.4 125300

5.5.9 9th Energy Level

NANA

14110 134700

5.5.10 10th Energy Level

NANA

17100 144300

5.5.11 11th Energy Level

NANA

19900 169988

5.5.12 12th Energy Level

NANA

22219 189368

5.5.13 13th Energy Level

NANA

26930 76015

5.5.14 14th Energy Level

NANA

29196 86450

5.5.15 15th Energy Level

NANA

41987 97510

5.5.16 16th Energy Level

NANA

47206 109480

5.5.17 17th Energy Level

NANA

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

NA1.77 g/amp-hr

0.16812 8.3209

5.7 Electron Work Function

NANA

2.14 5.65

5.8 Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity

Ionization, Radioactive Isotopes, Radioactivity, Solubility

6 Atomic

6.1 Atomic Number

10993

3 117

6.2 Electron Configuration

[Rn] 5f¹⁴ 6d⁷ 7s²

[Rn] 5f⁴ 6d¹ 7s²

6.3 Crystal Structure

Face Centered Cubic (FCC)

Orthorhombic (ORTH)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

10993

3 117

6.4.2 Number of Neutrons

157144

4 184

6.4.3 Number of Electrons

10993

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

122.00 pm155.00 pm

112 265

6.5.2 Covalent Radius

129.00 pm190.00 pm

96 260

6.5.3 Van der Waals Radius

NA221.00 pm

139 348

6.6 Atomic Weight

278.00 amu237.00 amu

6.94 294

6.7 Atomic Volume

NA11.62 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

NA96.00 (-eV)

8 392.42

6.10 Lattice Constant

NA666.30 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

37.40 g/cm³19.38 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

NANA

0.512 20

7.2 Tensile Strength

NA125.00 MPa

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

NA0.11 (Pa)

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

NANA

1.3 222

7.5.2 Bulk Modulus

NANA

1.6 462

7.5.3 Young's Modulus

NANA

1.7 528

7.6 Poisson Ratio

NANA

0.032 0.47

7.7 Other Mechanical Properties

Ductile

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

NA20.25

0.53 4500

8.1.2 Magnetic Ordering

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

NA1.22 nΩ·m

0.18 961

8.2.3 Electrical Conductivity

NA0.01 10⁶/cm Ω

0.00666 0.63

8.2.4 Electron Affinity

NANA

0 222.8

9 Thermal

9.1 Specific Heat

NA0.12 J/(kg K)

0.11 3.6

9.2 Molar Heat Capacity

NA29.46 J/mol·K

16.443 62.7

9.3 Thermal Conductivity

NA6.30 W/m·K

6.3 429

9.4 Critical Temperature

NANA

26.3 3223

9.5 Thermal Expansion

NANA

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

NANA

7.32 799.1

9.6.2 Enthalpy of Fusion

NA3.20 kJ/mol

2.1 35.23

9.6.3 Enthalpy of Atomization

NANA

61.5 837

9.7 Standard Molar Entropy

NANA

9.5 198.1

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