Beryllium

Chromium

Beryllium Chromium Comparison

Beryllium

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

s block

d block

1.5 Element Family

Alkaline Earth

Transition Metal

1.6 CAS Number

74404177440473

7429905 54386242

1.7 Space Group Name

P63/mmc

Im_ 3m

1.8 Space Group Number

194.00229.00

11 229

2 Facts

2.1 Interesting Facts

Beryllium is best anti corrosion metal.

Beryllium is the lightest metal and still it is stronger than steel.

It also finds various applications in Nuclear reactors as a reflector.

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

Earth's crust, Found in Minerals, Mining, Ores of metals, Ores of Minerals

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

2.3 History

2.3.1 Who Discovered

Louis Nicolas Vauquelin

2.3.2 Discovery

In 1797

In Between 1797 - 1798

2.4 Abundance

2.4.1 Abundance In Universe

1 * 10^-7 %1.5 * 10^-3 %

5E-09 0.11

2.4.2 Abundance In Sun

~0.00000001 %~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

0.00 %0.00 %

1E-13 1.4

3 Uses

3.1 Uses & Benefits

Its alloys with copper or nickel are used in manufacturing Gyroscopes, springs, electrical contact and non sparking tools.
Beryllium Alloys are used as a material for aircraft, missiles, spacecraft and satellite.

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

Aerospace Industry, Ammunition Industry, Automobile Industry, 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

Toxic

Highly Toxic

3.2.2 Present in Human Body

✔ ✘

3.2.3 In Blood

0.00 Blood/mg dm-30.11 Blood/mg dm-3

0 1970

3.2.4 In Bone

0.00 p.p.m.0.33 p.p.m.

0 170000

4 Physical

4.1 Melting Point

1,278.00 °C1,857.00 °C

27 3410

4.2 Boiling Point

2,970.00 °C2,672.00 °C

147 5660

4.3 Appearance

4.3.1 Physical State

Solid

4.3.2 Color

White Gray

Silver

4.3.3 Luster

Metallic

4.4 Hardness

4.4.1 Mohs Hardness

5.508.50

0.2 8.5

4.4.2 Brinell Hardness

590.00 MPa687.00 MPa

0.14 3490

4.4.3 Vickers Hardness

1,670.00 MPa1,060.00 MPa

121 3430

4.5 Speed of Sound

12,890.00 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

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

921

0 38

5.3 Electronegativity

5.3.1 Pauling Electronegativity

1.571.66

0.7 2.54

5.3.2 Sanderson Electronegativity

1.811.66

0.22 2.56

5.3.3 Allred Rochow Electronegativity

1.471.56

0.86 1.82

5.3.4 Mulliken-Jaffe Electronegativity

1.54NA

0.62 2.48

5.3.5 Allen Electronegativity

1.581.65

0.659 2.7

5.4 Electropositivity

5.4.1 Pauling Electropositivity

2.432.34

1.46 3.3

5.5 Ionization Energies

5.5.1 1st Energy Level

899.50 kJ/mol26,130.00 kJ/mol

375.7 26130

5.5.2 2nd Energy Level

1,757.10 kJ/mol28,750.00 kJ/mol

710.2162 28750

5.5.3 3rd Energy Level

14,848.70 kJ/mol34,230.00 kJ/mol

1600 34230

5.5.4 4th Energy Level

21,006.60 kJ/mol37,066.00 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

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

0.16812 8.3209

5.7 Electron Work Function

4.98 eV4.50 eV

2.14 5.65

5.8 Other Chemical Properties

Corrosion, Ionization, Radioactive Isotopes

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

6 Atomic

6.1 Atomic Number

424

3 117

6.2 Electron Configuration

[He] 2s²

[Ar] 3d⁵ 4s¹

6.3 Crystal Structure

Hexagonal Close Packed (HCP)

Body Centered Cubic (BCC)

6.3.1 Crystal Lattice

6.4 Atom

6.4.1 Number of Protons

424

3 117

6.4.2 Number of Neutrons

528

4 184

6.4.3 Number of Electrons

424

3 117

6.5 Radius of an Atom

6.5.1 Atomic Radius

112.00 pm128.00 pm

112 265

6.5.2 Covalent Radius

96.00 pm139.00 pm

96 260

6.5.3 Van der Waals Radius

153.00 pm200.00 pm

139 348

6.6 Atomic Weight

9.01 amu52.00 amu

6.94 294

6.7 Atomic Volume

5.00 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

82.00 (-eV)170.00 (-eV)

8 392.42

6.10 Lattice Constant

228.58 pm291.00 pm

228.58 891.25

6.11 Lattice Angles

π/2, π/2, π/2

6.12 Lattice C/A Ratio

1.57NA

1.567 1.886

7 Mechanical

7.1 Density

7.1.1 Density At Room Temperature

1.85 g/cm³7.19 g/cm³

0.534 40.7

7.1.2 Density When Liquid (at m.p.)

1.69 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

0.00 (Pa)0.00 (Pa)

2.47E-11 121

7.4.2 Vapor Pressure at 2000 K

NA774.00 (Pa)

2.62E-10 774

7.5 Elasticity properties

7.5.1 Shear Modulus

132.00 GPa115.00 GPa

1.3 222

7.5.2 Bulk Modulus

130.00 GPa160.00 GPa

1.6 462

7.5.3 Young's Modulus

287.00 GPa279.00 GPa

1.7 528

7.6 Poisson Ratio

0.030.21

0.032 0.47

7.7 Other Mechanical Properties

8 Magnetic

8.1 Magnetic Characteristics

8.1.1 Specific Gravity

1.857.19

0.53 4500

8.1.2 Magnetic Ordering

Diamagnetic

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

Semiconductor

8.2.2 Resistivity

36.00 nΩ·m125.00 nΩ·m

0.18 961

8.2.3 Electrical Conductivity

0.31 10⁶/cm Ω0.08 10⁶/cm Ω

0.00666 0.63

8.2.4 Electron Affinity

0.00 kJ/mol64.30 kJ/mol

0 222.8

9 Thermal

9.1 Specific Heat

1.82 J/(kg K)0.45 J/(kg K)

0.11 3.6

9.2 Molar Heat Capacity

16.44 J/mol·K23.35 J/mol·K

16.443 62.7

9.3 Thermal Conductivity

200.00 W/m·K93.90 W/m·K

6.3 429

9.4 Critical Temperature

NANA

26.3 3223

9.5 Thermal Expansion

11.30 µm/(m·K)4.90 µm/(m·K)

4.5 97

9.6 Enthalpy

9.6.1 Enthalpy of Vaporization

294.70 kJ/mol348.80 kJ/mol

7.32 799.1

9.6.2 Enthalpy of Fusion

11.72 kJ/mol15.31 kJ/mol

2.1 35.23

9.6.3 Enthalpy of Atomization

326.40 kJ/mol397.50 kJ/mol

61.5 837

9.7 Standard Molar Entropy

9.50 J/mol.K23.80 J/mol.K

9.5 198.1

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