Db Element

Dubnium

Periodic Table

Symbol

Group Number

5 13

Period Number

7 1

Block

d block

Element Family

Transition Metal

CAS Number

53850354 14

Space Group Name

Space Group Number

166.00 9

Facts

Interesting Facts

IUPAC allotted a temporary name to Dubnium metal as “ Unnilpentium”.

In the production of Dubnium, thermal gradient chromatography is used.

Sources

Produced by Bombarding Am243 with Ne22, Synthetically Produced

History

Who Discovered

Joint Institute for Nuclear Research

Discovery

In 1968

Abundance

Abundance In Universe

0.00 % 40

Abundance In Sun

Abundance In Meteorites

0.00 % 54

Abundance In Earth's Crust

Abundance In Oceans

Abundance In Humans

Uses

Uses & Benefits

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

Industrial Uses

Medical Uses

Other Uses

Research Purposes

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

Boiling Point

0.00 °C 82

Appearance

Physical State

Solid

Color

Luster

Unknown Luster

Hardness

Mohs Hardness

6.00 6

Brinell Hardness

330.00 MPa 38

Vickers Hardness

400.00 MPa 41

Speed of Sound

2,680.00 m/s 48

Optical Properties

Refractive Index

1.20 44

Reflectivity

55.00 % 27

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

10 28

Electronegativity

Pauling Electronegativity

2.20 5

Sanderson Electronegativity

1.30 25

Allred Rochow Electronegativity

1.30 25

Mulliken-Jaffe Electronegativity

1.10 44

Allen Electronegativity

1.30 40

Electropositivity

Pauling Electropositivity

2.00 47

Ionization Energies

1st Energy Level

664.80 kJ/mol 38

2nd Energy Level

1,546.70 kJ/mol 39

3rd Energy Level

2,378.40 kJ/mol 54

4th Energy Level

3,298.80 kJ/mol 71

5th Energy Level

4,305.20 kJ/mol 82

6th Energy Level

12,900.00 kJ/mol 5

7th Energy level

3,300.00 kJ/mol 85

8th Energy Level

5,280.00 kJ/mol 72

9th Energy Level

5,780.00 kJ/mol 58

10th Energy Level

8,830.00 kJ/mol 22

11th Energy Level

3,300.00 kJ/mol 85

12th Energy Level

88,300.00 kJ/mol 2

13th Energy Level

4,760.00 kJ/mol 76

14th Energy Level

1,120.00 kJ/mol 70

15th Energy Level

33,000.00 kJ/mol 86

16th Energy Level

33,000.00 kJ/mol 70

17th Energy Level

1,129.00 kJ/mol 19

18th Energy Level

0.00 kJ/mol 88

19th Energy Level

1,094.90 kJ/mol 18

20th Energy Level

0.00 kJ/mol 83

21st Energy Level

883.00 kJ/mol 36

22nd Energy Level

330.00 kJ/mol 84

23rd Energy Level

1,150.00 kJ/mol 33

24th Energy Level

528.30 kJ/mol 77

25th Energy Level

0.00 kJ/mol 81

26th Energy Level

579.80 kJ/mol 61

27th Energy Level

0.00 kJ/mol 86

28th Energy Level

1,150.00 kJ/mol 3

29th Energy Level

1,094.00 kJ/mol 5

30th Energy Level

0.00 kJ/mol 84

Electrochemical Equivalent

3.00 g/amp-hr 21

Electron Work Function

4.90 eV 12

Other Chemical Properties

Ionization, Radioactive Isotopes, Radioactivity

Atomic

Atomic Number

105 13

Electron Configuration

[Rn] 5f¹⁴ 6d³ 7s²

Crystal Structure

Body Centered Cubic (BCC)

Crystal Lattice

BCC-Crystal-Structure-.jpg#100

Atom

Number of Protons

105 13

Number of Neutrons

157 8

Number of Electrons

105 13

Radius of an Atom

Atomic Radius

139.00 pm 41

Covalent Radius

149.00 pm 37

Van der Waals Radius

0.00 pm 53

Atomic Weight

268.00 amu 10

Atomic Volume

22.80 cm3/mol 17

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

0.00 (-eV) 78

Lattice Constant

Lattice Angles

Lattice C/A Ratio

1.63 14

Mechanical

Density

Density At Room Temperature

29.30 g/cm³ 5

Density When Liquid (at m.p.)

29.30 g/cm3 6

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

34.00 GPa 22

Bulk Modulus

39.00 GPa 39

Young's Modulus

0.00 GPa 74

Poisson Ratio

0.39 5

Other Mechanical Properties

Magnetic

Magnetic Characteristics

Specific Gravity

39.00 3

Magnetic Ordering

Permeability

0.00 H/m 17

Susceptibility

0.00 24

Electrical Properties

Electrical Property

Resistivity

6.80 nΩ·m 57

Electrical Conductivity

0.00 10⁶/cm Ω 71

Electron Affinity

Thermal

Specific Heat

0.10 J/(kg K) 44

Molar Heat Capacity

29.30 J/mol·K 11

Thermal Conductivity

0.00 W/m·K 80

Critical Temperature

1,323.00 K 47

Thermal Expansion

13.20 µm/(m·K) 37

Enthalpy

Enthalpy of Vaporization

289.70 kJ/mol 51

Enthalpy of Fusion

Enthalpy of Atomization

Standard Molar Entropy

55.00 J/mol.K 34

Summary >>

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