Tantalum

Chromium

Tantalum Chromium Comparison

Tantalum

Chromium

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1 Periodic Table

1.1 Symbol

1.2 Group Number

0 17

1.3 Period Number

2 7

1.4 Block

d block

1.5 Element Family

Transition Metal

1.6 CAS Number

74402577440473

7429905 54386242

1.7 Space Group Name

Im_ 3m

1.8 Space Group Number

229.00229.00

11 229

2 Facts

2.1 Interesting Facts

Tantalum metal is known as corrosion resistance.
Tantalum metal can easily fabricated and It is a good conductor of heat and electricity.

Chromium is highly reactive, hence it is not found free in nature.

Ores of Chromites mineral are the major source of Chromium metal.

Almost 90% leather tanning is done with the help of chromium.

2.2 Sources

Found in Minerals, Mining, Ores of Minerals

Found in Minerals, Mining, Ores of metals, Ores of Minerals

2.3 History

2.3.1 Who Discovered

Anders Gustaf Ekeberg

Louis Nicolas Vauquelin

2.3.2 Discovery

In 1802

In Between 1797 - 1798

2.4 Abundance

2.4.1 Abundance In Universe

8 * 10^-9 %1.5 * 10^-3 %

5E-09 0.11

2.4.2 Abundance In Sun

~-9999 %~0.002 %

1E-08 0.1

2.4.3 Abundance In Meteorites

0.00 %0.30 %

1.7E-07 22

2.4.4 Abundance In Earth's Crust

0.00 %0.01 %

9.9E-12 8.1

2.4.5 Abundance In Oceans

0.00 %0.00 %

2E-23 1.1

2.4.6 Abundance In Humans

NA0.00 %

1E-13 1.4

3 Uses

3.1 Uses & Benefits

Tantalum metal is mainly used in the manufacturing of electron components. Its Oxide layer acts as an insulator.
Tantalum metal is also used in surgical transplant like replacement of bone, skull plates and as a woven gauze.

It is used to harden the steel and produces a stainless steel and other various alloys.
It is also used to give proper finish to polished mirrors. Its chromium plates are used in bathroom fittings.

3.1.1 Industrial Uses

Electrical Industry, Electronic Industry

Automobile Industry, Chemical Industry

3.1.2 Medical Uses

3.1.3 Other Uses

Alloys

3.2 Biological Properties

3.2.1 Toxicity

Low Toxic

Highly Toxic

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

NA0.11 Blood/mg dm-3

0 1970

3.2.4 In Bone

0.03 p.p.m.0.33 p.p.m.

0 170000

4 Physical

4.1 Melting Point

2,996.00 °C1,857.00 °C

27 3410

4.2 Boiling Point

5,425.00 °C2,672.00 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

Gray Blue

Silver

4.3.3 Luster

Metallic

4.4 Hardness

4.4.1 Mohs Hardness

6.508.50

0.2 8.5

4.4.2 Brinell Hardness

440.00 MPa687.00 MPa

0.14 3490

4.4.3 Vickers Hardness

870.00 MPa1,060.00 MPa

121 3430

4.5 Speed of Sound

3,400.00 m/s5,940.00 m/s

818 16200

4.6 Optical Properties

4.6.1 Refractive Index

NANA

1.000933 1.7229

4.6.2 Reflectivity

78.00 %NA

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

3121

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

1.501.66

0.7 2.54

5.3.2 Sanderson Electronegativity

NA1.66

0.22 2.56

5.3.3 Allred Rochow Electronegativity

1.331.56

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

NANA

0.62 2.48

5.3.5 Allen Electronegativity

1.341.65

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

2.502.34

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

761.00 kJ/mol26,130.00 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

1,500.00 kJ/mol28,750.00 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

NA34,230.00 kJ/mol

1600 34230

5.5.4 4th Energy Level

NA37,066.00 kJ/mol

2780 37066

5.5.5 5th Energy Level

NA97,510.00 kJ/mol

4305.2 97510

5.5.6 6th Energy Level

NA105,800.00 kJ/mol

5715.8 105800

5.5.7 7th Energy level

NA114,300.00 kJ/mol

7226.8 114300

5.5.8 8th Energy Level

NA125,300.00 kJ/mol

8857.4 125300

5.5.9 9th Energy Level

NA134,700.00 kJ/mol

14110 134700

5.5.10 10th Energy Level

NA144,300.00 kJ/mol

17100 144300

5.5.11 11th Energy Level

NA26,130.00 kJ/mol

19900 169988

5.5.12 12th Energy Level

NA28,750.00 kJ/mol

22219 189368

5.5.13 13th Energy Level

NA34,230.00 kJ/mol

26930 76015

5.5.14 14th Energy Level

NA37,066.00 kJ/mol

29196 86450

5.5.15 15th Energy Level

NA97,510.00 kJ/mol

41987 97510

5.5.16 16th Energy Level

NA105,800.00 kJ/mol

47206 109480

5.5.17 17th Energy Level

NA114,300.00 kJ/mol

52737 122200

5.5.18 18th Energy Level

NA125,300.00 kJ/mol

58570 134810

5.5.19 19th Energy Level

NA134,700.00 kJ/mol

64702 148700

5.5.20 20th Energy Level

NA144,300.00 kJ/mol

80400 171200

5.5.21 21st Energy Level

NA157,700.00 kJ/mol

87000 179100

5.5.22 22nd Energy Level

NA166,090.00 kJ/mol

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

1.35 g/amp-hr0.32 g/amp-hr

0.16812 8.3209

5.7 Electron Work Function

4.25 eV4.50 eV

2.14 5.65

5.8 Other Chemical Properties

Anti Corrosion, Ionization, Radioactive Isotopes, Radioactivity, Solubility

Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility

6 Atomic

6.1 Atomic Number

7324

3 117

6.2 Electron Configuration

[Xe] 4f¹⁴ 5d³ 6s²

[Ar] 3d⁵ 4s¹

6.3 Crystal Structure

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

7324

3 117

6.4.2 Number of Neutrons

10828

4 184

6.4.3 Number of Electrons

7324

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

146.00 pm128.00 pm

112 265

6.5.2 Covalent Radius

170.00 pm139.00 pm

96 260

6.5.3 Van der Waals Radius

200.00 pm200.00 pm

139 348

6.6 Atomic Weight

180.95 amu52.00 amu

6.94 294

6.7 Atomic Volume

10.90 cm3/mol7.23 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

110.00 (-eV)170.00 (-eV)

8 392.42

6.10 Lattice Constant

330.13 pm291.00 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

16.69 g/cm³7.19 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

15.00 g/cm36.30 g/cm3

0.512 20

7.2 Tensile Strength

NA689.00 MPa

2.5 11000

7.3 Viscosity

NANA

0.001526 0.001526

7.4 Vapor Pressure

7.4.1 Vapor Pressure at 1000 K

NA0.00 (Pa)

2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

0.00 (Pa)774.00 (Pa)

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

69.00 GPa115.00 GPa

1.3 222

7.5.2 Bulk Modulus

200.00 GPa160.00 GPa

1.6 462

7.5.3 Young's Modulus

186.00 GPa279.00 GPa

1.7 528

7.6 Poisson Ratio

0.340.21

0.032 0.47

7.7 Other Mechanical Properties

Ductile

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

16.657.19

0.53 4500

8.1.2 Magnetic Ordering

Paramagnetic

Antiferromagnetic

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

Conductor

8.2.2 Resistivity

131.00 nΩ·m125.00 nΩ·m

0.18 961

8.2.3 Electrical Conductivity

0.08 10⁶/cm Ω0.08 10⁶/cm Ω

0.00666 0.63

8.2.4 Electron Affinity

31.00 kJ/mol64.30 kJ/mol

0 222.8

9 Thermal

9.1 Specific Heat

0.14 J/(kg K)0.45 J/(kg K)

0.11 3.6

9.2 Molar Heat Capacity

25.36 J/mol·K23.35 J/mol·K

16.443 62.7

9.3 Thermal Conductivity

57.50 W/m·K93.90 W/m·K

6.3 429

9.4 Critical Temperature

NANA

26.3 3223

9.5 Thermal Expansion

6.30 µm/(m·K)4.90 µm/(m·K)

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

753.10 kJ/mol348.80 kJ/mol

7.32 799.1

9.6.2 Enthalpy of Fusion

31.40 kJ/mol15.31 kJ/mol

2.1 35.23

9.6.3 Enthalpy of Atomization

782.00 kJ/mol397.50 kJ/mol

61.5 837

9.7 Standard Molar Entropy

41.50 J/mol.K23.80 J/mol.K

9.5 198.1

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