Molybdenum

Samarium

Molybdenum vs Samarium

Molybdenum

Samarium

Add ⊕

Periodic Table

Symbol

Group Number

0 17

👆🏻

Period Number

2 7

👆🏻

Block

d block

f block

Element Family

Transition Metal

Lanthanide

CAS Number

74399877440199

7429905 54386242

👆🏻

Space Group Name

Im_ 3m

R_ 3m

Space Group Number

229.00166.00

11 276

👆🏻

Facts

Interesting Facts

Molybdenum is highly reactive metal, hence not found free in nature .
Till 18th century Molybdenum element were often mistaken as a carbon or Lead.

Samarium metals helps stimulating body metabolism.
Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.

Sources

Found in Minerals, Mining, Ores of Minerals

History

Who Discovered

Carl Wilhelm Scheele

Lecoq de Boisbaudran

Discovery

In 1778

In 1879

Abundance

Abundance In Universe

0.00 %0.00 %

0 0.11

👆🏻

Abundance In Sun

0.00 %0.00 %

0 0.1

👆🏻

Abundance In Meteorites

0.00 %0.00 %

0 22

👆🏻

Abundance In Earth's Crust

0.00 %0.00 %

1E-37 8.1

👆🏻

Abundance In Oceans

0.00 %0.00 %

0 1.1

👆🏻

Abundance In Humans

0.00 %0.00 %

0 1.4

👆🏻

Uses

Uses & Benefits

Its alloys are used to make engine parts, drills, saw blade, etc.

Lubricant additive made up of Molybdenum disulfide is commonly used in the industry. It is also used as a catalyst.

Magnets of Samarium cobalt alloy are stronger than that of Iron and hence, they are used in microwave application.

Samarium metal also used in optical lasers and infrared absorbing glasses and as a neutron absorber.

Industrial Uses

Aerospace Industry, Electrical Industry, Electronic Industry

Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry

Medical Uses

Other Uses

Alloys

Alloys, In Nuclear Reactors

Biological Properties

Toxicity

Toxic

Slightly Toxic

Present in Human Body

✔ ✘

In Blood

0.00 Blood/mg dm-30.01 Blood/mg dm-3

0 1970

👆🏻

In Bone

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

0 170000

👆🏻

Physical

Melting Point

2,617.00 °C1,072.00 °C

-38.83 3410

👆🏻

Boiling Point

4,612.00 °C1,900.00 °C

0 5660

👆🏻

Appearance

Physical State

Solid

Color

Gray

Silvery White

Luster

Metallic

Lustrous

Hardness

Mohs Hardness

5.505.50

0.2 8.5

👆🏻

Brinell Hardness

1,370.00 MPa441.00 MPa

0.14 3490

👆🏻

Vickers Hardness

1,400.00 MPa412.00 MPa

0 3920

👆🏻

Speed of Sound

5,400.00 m/s2,130.00 m/s

818 16200

👆🏻

Optical Properties

Refractive Index

2.001.80

0.155 3.41

👆🏻

Reflectivity

58.00 %65.00 %

5 97

👆🏻

Allotropes

✔ ✘

α Allotropes

β Allotropes

γ Allotropes

Chemical

Chemical Formula

Isotopes

Known Isotopes

2530

0 38

👆🏻

Electronegativity

Pauling Electronegativity

2.161.17

0 2.6

👆🏻

Sanderson Electronegativity

1.151.17

0.22 2.56

👆🏻

Allred Rochow Electronegativity

1.301.07

0.86 1.9

👆🏻

Mulliken-Jaffe Electronegativity

2.161.17

0.62 2.48

👆🏻

Allen Electronegativity

2.161.17

0.659 2.7

👆🏻

Electropositivity

Pauling Electropositivity

1.842.83

1.46 3.3

👆🏻

Ionization Energies

1st Energy Level

684.30 kJ/mol544.50 kJ/mol

375.7 26130

👆🏻

2nd Energy Level

1,560.00 kJ/mol1,070.00 kJ/mol

392.8 28750

👆🏻

3rd Energy Level

2,618.00 kJ/mol2,260.00 kJ/mol

392.8 34230

👆🏻

4th Energy Level

4,480.00 kJ/mol3,990.00 kJ/mol

375.7 37066

👆🏻

5th Energy Level

5,257.00 kJ/mol5,445.00 kJ/mol

392 97510

👆🏻

6th Energy Level

6,640.80 kJ/mol5,445.00 kJ/mol

1007 105800

👆🏻

7th Energy level

12,125.00 kJ/mol5,445.00 kJ/mol

1007 114300

👆🏻

8th Energy Level

13,860.00 kJ/mol5,400.00 kJ/mol

730 125300

👆🏻

9th Energy Level

15,835.00 kJ/mol5,440.00 kJ/mol

1007 134700

👆🏻

10th Energy Level

17,980.00 kJ/mol5,445.00 kJ/mol

392 144300

👆🏻

11th Energy Level

20,190.00 kJ/mol5,445.00 kJ/mol

392 169988

👆🏻

12th Energy Level

22,219.00 kJ/mol5,440.00 kJ/mol

0 189368

👆🏻

13th Energy Level

26,930.00 kJ/mol5,445.00 kJ/mol

1007 76015

👆🏻

14th Energy Level

29,196.00 kJ/mol5,450.00 kJ/mol

380 86450

👆🏻

15th Energy Level

52,490.00 kJ/mol54,450.00 kJ/mol

33000 100700

👆🏻

16th Energy Level

55,000.00 kJ/mol54,400.00 kJ/mol

375.7 109480

👆🏻

17th Energy Level

61,400.00 kJ/mol544.50 kJ/mol

375.7 122200

👆🏻

18th Energy Level

67,700.00 kJ/mol5,445.00 kJ/mol

0 134810

👆🏻

19th Energy Level

74,000.00 kJ/mol544.50 kJ/mol

375.7 148700

👆🏻

20th Energy Level

80,400.00 kJ/mol624.00 kJ/mol

0 171200

👆🏻

21st Energy Level

87,000.00 kJ/mol544.50 kJ/mol

375.7 179100

👆🏻

22nd Energy Level

93,400.00 kJ/mol624.00 kJ/mol

330 184900

👆🏻

23rd Energy Level

98,420.00 kJ/mol544.50 kJ/mol

357.6 198800

👆🏻

24th Energy Level

104,400.00 kJ/mol544.50 kJ/mol

297.3 195200

👆🏻

25th Energy Level

121,900.00 kJ/mol544.00 kJ/mol

0 121900

👆🏻

26th Energy Level

127,700.00 kJ/mol544.50 kJ/mol

357.6 127700

👆🏻

27th Energy Level

133,800.00 kJ/mol544.50 kJ/mol

0 133800

👆🏻

28th Energy Level

139,800.00 kJ/mol544.50 kJ/mol

297.3 139800

👆🏻

29th Energy Level

148,100.00 kJ/mol544.50 kJ/mol

0 148100

👆🏻

30th Energy Level

154,500.00 kJ/mol544.00 kJ/mol

0 154500

👆🏻

Electrochemical Equivalent

0.89 g/amp-hr1.87 g/amp-hr

0.16812 8.3209

👆🏻

Electron Work Function

4.60 eV2.70 eV

2.14 6

👆🏻

Other Chemical Properties

Anti Corrosion, Ionization, Radioactive Isotopes, Solubility

Ionization, Radioactive Isotopes

Atomic

Atomic Number

4262

3 117

👆🏻

Electron Configuration

[Kr] 4d⁵ 5s¹

[Xe] 4f⁶ 6s²

Crystal Structure

Body Centered Cubic (BCC)

Rhombohedral (RHO)

Crystal Lattice

Atom

Number of Protons

4262

3 117

👆🏻

Number of Neutrons

5488

4 285

👆🏻

Number of Electrons

4262

3 117

👆🏻

Radius of an Atom

Atomic Radius

139.00 pm180.00 pm

0 348

👆🏻

Covalent Radius

154.00 pm198.00 pm

0 260

👆🏻

Van der Waals Radius

200.00 pm229.00 pm

0 348

👆🏻

Atomic Weight

95.95 amu150.36 amu

6.94 294

👆🏻

Atomic Volume

9.40 cm3/mol19.95 cm3/mol

1.39 71.07

👆🏻

Adjacent Atomic Numbers

Previous Element

Next Element

Valence Electron Potential

88.60 (-eV)44.80 (-eV)

0 392.42

👆🏻

Lattice Constant

314.70 pm362.10 pm

0 891.25

👆🏻

Lattice Angles

π/2, π/2, π/2

π/2, π/2, 2 π/3

Lattice C/A Ratio

1.031.62

0.423 1.9

👆🏻

Mechanical

Density

Density At Room Temperature

10.28 g/cm³7.52 g/cm³

0.534 40.7

👆🏻

Density When Liquid (at m.p.)

9.33 g/cm37.16 g/cm3

0.512 41

👆🏻

Tensile Strength

324.00 MPa50.00 MPa

0.1 11000

👆🏻

Viscosity

0.000.00

1.5E-05 0.0035

👆🏻

Vapor Pressure

Vapor Pressure at 1000 K

0.00 (Pa)0.94 (Pa)

0 121

👆🏻

Vapor Pressure at 2000 K

0.00 (Pa)0.00 (Pa)

0 774

👆🏻

Elasticity properties

Shear Modulus

126.00 GPa19.50 GPa

1.3 222

👆🏻

Bulk Modulus

230.00 GPa37.80 GPa

0 462

👆🏻

Young's Modulus

329.00 GPa49.70 GPa

0 528

👆🏻

Poisson Ratio

0.310.27

0.032 0.47

👆🏻

Other Mechanical Properties

Ductile, Weldable

Magnetic

Magnetic Characteristics

Specific Gravity

10.227.52

0.53 4500

👆🏻

Magnetic Ordering

Paramagnetic

Permeability

0.00 H/m0.00 H/m

1.25643E-06 0.0063

👆🏻

Susceptibility

0.000.00

-0.000166 200000

👆🏻

Electrical Properties

Electrical Property

Semiconductor

Conductor

Resistivity

53.40 nΩ·m0.94 nΩ·m

0.1 961

👆🏻

Electrical Conductivity

0.19 10⁶/cm Ω0.01 10⁶/cm Ω

0 0.63

👆🏻

Electron Affinity

71.90 kJ/mol50.00 kJ/mol

0 222.8

👆🏻

Thermal

Specific Heat

0.25 J/(kg K)0.20 J/(kg K)

0.1 3.6

👆🏻

Molar Heat Capacity

24.06 J/mol·K29.54 J/mol·K

13.1 62.7

👆🏻

Thermal Conductivity

138.00 W/m·K13.30 W/m·K

0 429

👆🏻

Critical Temperature

2,896.00 K1,345.00 K

26.3 3695

👆🏻

Thermal Expansion

4.80 µm/(m·K)12.70 µm/(m·K)

4.5 97

👆🏻

Enthalpy

Enthalpy of Vaporization

594.10 kJ/mol166.40 kJ/mol

7.32 799.1

👆🏻

Enthalpy of Fusion

27.61 kJ/mol8.62 kJ/mol

2.1 35.23

👆🏻

Enthalpy of Atomization

653.00 kJ/mol209.00 kJ/mol

61.5 837

👆🏻

Standard Molar Entropy

28.70 J/mol.K69.60 J/mol.K

9.5 198.1

👆🏻

Compare Transition Metals » More

Molybdenum vs Zirconium

Molybdenum vs Tantalum

Molybdenum vs Technetium

» More Compare Transition Metals

Transition Metals » More

» More Transition Metals