What is Technetium?

Technetium

Periodic Table

Symbol

Group Number

7 11

Period Number

5 3

Block

d block

Element Family

Transition Metal

CAS Number

7440268 54

Space Group Name

P63/mmc

Space Group Number

194.00 7

Facts

Interesting Facts

Original name of Technetium was Masurium.
At the time of its discovery it found in sample of Molybdenum.

Sources

Made by Bombarding Molybdenum with Deuterons

History

Who Discovered

Emilio Segrè and Carlo Perriero

Discovery

In 1937

Abundance

Abundance In Universe

0.00 % 40

Abundance In Sun

0.00 % 18

Abundance In Meteorites

Abundance In Earth's Crust

0.00 % 60

Abundance In Oceans

Abundance In Humans

Uses

Uses & Benefits

Technetium is a radioactive metal and hence it is used for medical studies and other research purposes.

Industrial Uses

Medical Uses

Other Uses

Alloys, Nuclear Research, Research Purposes

Biological Properties

Toxicity

Low Toxic

Present in Human Body

In Blood

0.00 Blood/mg dm-3 40

In Bone

0.00 p.p.m. 41

Physical

Melting Point

2,200.00 °C 9

Boiling Point

4,877.00 °C 7

Appearance

Physical State

Solid

Color

Shiny Gray

Luster

Hardness

Mohs Hardness

2.25 16

Brinell Hardness

550.00 MPa 27

Vickers Hardness

500.00 MPa 35

Speed of Sound

16,200.00 m/s 1

Optical Properties

Refractive Index

1.90 18

Reflectivity

35.00 % 34

Allotropes

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

18 21

Electronegativity

Pauling Electronegativity

1.90 12

Sanderson Electronegativity

1.90 13

Allred Rochow Electronegativity

1.36 21

Mulliken-Jaffe Electronegativity

1.90 13

Allen Electronegativity

1.51 31

Electropositivity

Pauling Electropositivity

2.10 43

Ionization Energies

1st Energy Level

702.00 kJ/mol 36

2nd Energy Level

1,470.00 kJ/mol 42

3rd Energy Level

2,850.00 kJ/mol 34

4th Energy Level

7,020.00 kJ/mol 14

5th Energy Level

7,020.00 kJ/mol 28

6th Energy Level

7,020.00 kJ/mol 46

7th Energy level

4,700.00 kJ/mol 80

8th Energy Level

4,700.00 kJ/mol 78

9th Energy Level

7,020.00 kJ/mol 35

10th Energy Level

7,020.00 kJ/mol 39

11th Energy Level

7,020.00 kJ/mol 37

12th Energy Level

7,020.00 kJ/mol 55

13th Energy Level

7,020.00 kJ/mol 33

14th Energy Level

7,020.00 kJ/mol 23

15th Energy Level

70,200.00 kJ/mol 29

16th Energy Level

70,200.00 kJ/mol 24

17th Energy Level

702.50 kJ/mol 44

18th Energy Level

7,020.00 kJ/mol 35

19th Energy Level

702.00 kJ/mol 41

20th Energy Level

702.00 kJ/mol 35

21st Energy Level

702.00 kJ/mol 53

22nd Energy Level

702.00 kJ/mol 29

23rd Energy Level

702.00 kJ/mol 53

24th Energy Level

702.50 kJ/mol 28

25th Energy Level

702.00 kJ/mol 30

26th Energy Level

702.00 kJ/mol 29

27th Energy Level

702.00 kJ/mol 30

28th Energy Level

702.00 kJ/mol 35

29th Energy Level

702.00 kJ/mol 36

30th Energy Level

702.00 kJ/mol 30

Electrochemical Equivalent

0.52 g/amp-hr 72

Electron Work Function

4.90 eV 12

Other Chemical Properties

Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility

Atomic

Atomic Number

43 69

Electron Configuration

[Kr] 4d⁵ 5s²

Crystal Structure

Hexagonal Close Packed (HCP)

Crystal Lattice

HCP-Crystal-Structure-of-Technetium.jpg#100

Atom

Number of Protons

43 68

Number of Neutrons

55 52

Number of Electrons

43 68

Radius of an Atom

Atomic Radius

136.00 pm 43

Covalent Radius

147.00 pm 39

Van der Waals Radius

200.00 pm 35

Atomic Weight

98.00 amu 63

Atomic Volume

8.50 cm3/mol 75

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

180.00 (-eV) 3

Lattice Constant

273.50 pm 72

Lattice Angles

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.60 21

Mechanical

Density

Density At Room Temperature

11.00 g/cm³ 36

Density When Liquid (at m.p.)

11.00 g/cm3 34

Tensile Strength

50.00 MPa 38

Viscosity

0.00 25

Vapor Pressure

Vapor Pressure at 1000 K

0.00 (Pa) 37

Vapor Pressure at 2000 K

0.00 (Pa) 41

Elasticity properties

Shear Modulus

27.00 GPa 34

Bulk Modulus

100.00 GPa 16

Young's Modulus

50.00 GPa 39

Poisson Ratio

0.38 6

Other Mechanical Properties

Magnetic

Magnetic Characteristics

Specific Gravity

11.50 37

Magnetic Ordering

Paramagnetic

Permeability

0.00 H/m 17

Susceptibility

0.00 24

Electrical Properties

Electrical Property

Conductor

Resistivity

200.00 nΩ·m 18

Electrical Conductivity

0.07 10⁶/cm Ω 35

Electron Affinity

53.00 kJ/mol 23

Thermal

Specific Heat

0.21 J/(kg K) 30

Molar Heat Capacity

24.27 J/mol·K 61

Thermal Conductivity

50.60 W/m·K 30

Critical Temperature

2,150.00 K 16

Thermal Expansion

7.10 µm/(m·K) 64

Enthalpy

Enthalpy of Vaporization

660.00 kJ/mol 7

Enthalpy of Fusion

23.01 kJ/mol 9

Enthalpy of Atomization

649.00 kJ/mol 9

Standard Molar Entropy

181.10 J/mol.K 2

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