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Samarium
Samarium

Roentgenium
Roentgenium



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Samarium
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Samarium vs Roentgenium

1 Periodic Table
1.1 Symbol
Sm
Rg
1.2 Group Number
NA11
Gadolinium
0 17
1.3 Period Number
67
Lithium
2 7
1.4 Block
f block
d block
1.5 Element Family
Lanthanide
Unknown
1.6 CAS Number
744019954386242
Aluminium
7429905 54386242
1.7 Space Group Name
R_ 3m
Not Available
1.8 Space Group Number
166.00194.00
Plutonium
11 229
2 Facts
2.1 Interesting Facts
  • Samarium metals helps stimulating body metabolism.
  • Samarium metals was 1st observed by Jean Charles Galissard de Marignac in Dydimia in 1853.
Not Available
2.2 Sources
Found in Minerals, Mining, Ores of Minerals
Synthetically Produced
2.3 History
2.3.1 Who Discovered
Lecoq de Boisbaudran
Gesellschaft für Schwerionenforschung
2.3.2 Discovery
In 1879
In 1994
2.4 Abundance
2.4.1 Abundance In Universe
5 * 10-7 %NA
Thallium
5E-09 0.11
2.4.2 Abundance In Sun
~0.0000001 %~-9999 %
Beryllium
1E-08 0.1
2.4.3 Abundance In Meteorites
0.00 %NA
Gold
1.7E-07 22
2.4.4 Abundance In Earth's Crust
0.00 %NA
Radium
9.9E-12 8.1
2.4.5 Abundance In Oceans
0.00 %NA
Protactinium
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • 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.
  • Currently known uses of Roentgenium metal are limited to research purpose only.
3.1.1 Industrial Uses
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry
NA
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys, In Nuclear Reactors
Research Purposes
3.2 Biological Properties
3.2.1 Toxicity
Slightly Toxic
Unknown
3.2.2 Present in Human Body
3.2.3 In Blood
0.01 Blood/mg dm-30.00 Blood/mg dm-3
Plutonium
0 1970
3.2.4 In Bone
NA0.00 p.p.m.
Plutonium
0 170000
4 Physical
4.1 Melting Point
1,072.00 °CNA
Francium
27 3410
4.2 Boiling Point
1,900.00 °CNA
Flerovium
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Silver
4.3.3 Luster
Lustrous
Unknown Luster
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium
0.2 8.5
4.4.2 Brinell Hardness
441.00 MPaNA
Cesium
0.14 3490
4.4.3 Vickers Hardness
412.00 MPaNA
Palladium
121 3430
4.5 Speed of Sound
2,130.00 m/sNA
Thallium
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury
1.000933 1.7229
4.6.2 Reflectivity
NANA
Molybdenum
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Sm
Rg
5.2 Isotopes
5.2.1 Known Isotopes
301
Tennessine
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.17NA
Francium
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.07NA
Cesium
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NANA
Cesium
0.62 2.48
5.3.5 Allen Electronegativity
NANA
Cesium
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.83NA
Gold
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
544.50 kJ/mol1,022.70 kJ/mol
Cesium
375.7 26130
5.5.2 2nd Energy Level
1,070.00 kJ/mol2,074.40 kJ/mol
Ruthenium
710.2162 28750
5.5.3 3rd Energy Level
2,260.00 kJ/mol3,077.90 kJ/mol
Osmium
1600 34230
5.5.4 4th Energy Level
3,990.00 kJ/mol4,052.40 kJ/mol
Thorium
2780 37066
5.5.5 5th Energy Level
NA5,306.70 kJ/mol
Dubnium
4305.2 97510
5.5.6 6th Energy Level
NANA
Seaborgium
5715.8 105800
5.5.7 7th Energy level
NANA
Bohrium
7226.8 114300
5.5.8 8th Energy Level
NANA
Hassium
8857.4 125300
5.5.9 9th Energy Level
NANA
Yttrium
14110 134700
5.5.10 10th Energy Level
NANA
Strontium
17100 144300
5.5.11 11th Energy Level
NANA
Yttrium
19900 169988
5.5.12 12th Energy Level
NANA
Molybdenum
22219 189368
5.5.13 13th Energy Level
NANA
Molybdenum
26930 76015
5.5.14 14th Energy Level
NANA
Molybdenum
29196 86450
5.5.15 15th Energy Level
NANA
Manganese
41987 97510
5.5.16 16th Energy Level
NANA
Iron
47206 109480
5.5.17 17th Energy Level
NANA
Cobalt
52737 122200
5.5.18 18th Energy Level
NANA
Nickel
58570 134810
5.5.19 19th Energy Level
NANA
Copper
64702 148700
5.5.20 20th Energy Level
NANA
Molybdenum
80400 171200
5.5.21 21st Energy Level
NANA
Molybdenum
87000 179100
5.5.22 22nd Energy Level
NANA
Molybdenum
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum
154500 154500
5.6 Electrochemical Equivalent
1.87 g/amp-hrNA
Beryllium
0.16812 8.3209
5.7 Electron Work Function
2.70 eVNA
Cesium
2.14 5.65
5.8 Other Chemical Properties
Ionization, Radioactive Isotopes
NA
6 Atomic
6.1 Atomic Number
62111
Lithium
3 117
6.2 Electron Configuration
[Xe] 4f6 6s2
[Rn] 5f14 6d9 7s2
6.3 Crystal Structure
Rhombohedral (RHO)
Body Centered Cubic (BCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
62111
Lithium
3 117
6.4.2 Number of Neutrons
88161
Lithium
4 184
6.4.3 Number of Electrons
62111
Lithium
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
180.00 pmNA
Beryllium
112 265
6.5.2 Covalent Radius
198.00 pmNA
Beryllium
96 260
6.5.3 Van der Waals Radius
229.00 pmNA
Zinc
139 348
6.6 Atomic Weight
150.36 amu281.00 amu
Lithium
6.94 294
6.7 Atomic Volume
19.95 cm3/molNA
Manganese
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
44.80 (-eV)NA
Francium
8 392.42
6.10 Lattice Constant
362.10 pmNA
Beryllium
228.58 891.25
6.11 Lattice Angles
π/2, π/2, 2 π/3
NA
6.12 Lattice C/A Ratio
NANA
Beryllium
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
7.52 g/cm328.70 g/cm3
Lithium
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
7.16 g/cm3NA
Lithium
0.512 20
7.2 Tensile Strength
NANA
Indium
2.5 11000
7.3 Viscosity
NANA
Mercury
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
0.94 (Pa)NA
Cerium
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
NANA
Tungsten
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
19.50 GPaNA
Potassium
1.3 222
7.5.2 Bulk Modulus
37.80 GPaNA
Cesium
1.6 462
7.5.3 Young's Modulus
49.70 GPaNA
Cesium
1.7 528
7.6 Poisson Ratio
0.27NA
Beryllium
0.032 0.47
7.7 Other Mechanical Properties
NA
Unknown
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
7.52NA
Lithium
0.53 4500
8.1.2 Magnetic Ordering
Paramagnetic
Unknown
8.1.3 Permeability
NANA
Bismuth
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
Conductor
Unknown
8.2.2 Resistivity
0.94 nΩ·mNA
Thallium
0.18 961
8.2.3 Electrical Conductivity
0.01 106/cm ΩNA
Plutonium
0.00666 0.63
8.2.4 Electron Affinity
50.00 kJ/molNA
Mercury
0 222.8
9 Thermal
9.1 Specific Heat
0.20 J/(kg K)NA
Americium
0.11 3.6
9.2 Molar Heat Capacity
29.54 J/mol·KNA
Beryllium
16.443 62.7
9.3 Thermal Conductivity
13.30 W/m·KNA
Neptunium
6.3 429
9.4 Critical Temperature
NANA
Ytterbium
26.3 3223
9.5 Thermal Expansion
12.70 µm/(m·K)NA
Tungsten
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
166.40 kJ/molNA
Zinc
7.32 799.1
9.6.2 Enthalpy of Fusion
8.62 kJ/molNA
Cesium
2.1 35.23
9.6.3 Enthalpy of Atomization
209.00 kJ/molNA
Mercury
61.5 837
9.7 Standard Molar Entropy
69.60 J/mol.KNA
Beryllium
9.5 198.1