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Actinium
Actinium

Terbium
Terbium



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Actinium Terbium Comparison

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1 Periodic Table
1.1 Symbol
Ac
Tb
1.2 Group Number
NANA
Gadolinium Metal
0 17
1.3 Period Number
76
Lithium Metal
2 7
1.4 Block
f block
f block
1.5 Element Family
Actinide
Lanthanide
1.6 CAS Number
74403487440279
Aluminium Metal
7429905 54386242
1.7 Space Group Name
Fm_ 3m
P63/mmc
1.8 Space Group Number
225.00194.00
Plutonium Metal
11 229
2 Facts
2.1 Interesting Facts
Not Available
  • At times Terbium metal acts same as Calcium.
  • Terbium metal closely similar to Lanthanum metal.
2.2 Sources
Obtained by Treating Radium with Neutrons, Ores of metals
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals
2.3 History
2.3.1 Who Discovered
Friedrich Oskar Giesel
Carl Gustaf Mosander
2.3.2 Discovery
In 1902
In 1842
2.4 Abundance
2.4.1 Abundance In Universe
NA5 * 10-8 %
Thallium Metal
5E-09 0.11
2.4.2 Abundance In Sun
~-9999 %~0.00000001 %
Beryllium Metal
1E-08 0.1
2.4.3 Abundance In Meteorites
NA0.00 %
Gold Metal
1.7E-07 22
2.4.4 Abundance In Earth's Crust
NA0.00 %
Radium Metal
9.9E-12 8.1
2.4.5 Abundance In Oceans
NA0.00 %
Protactinium Metal
2E-23 1.1
2.4.6 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  • Terbium salts are used in optical devices like laser devices.
  • Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
3.1.1 Industrial Uses
NA
Electronic Industry
3.1.2 Medical Uses
NA
NA
3.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
3.2 Biological Properties
3.2.1 Toxicity
Toxic
Low Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
0.00 Blood/mg dm-3NA
Plutonium Metal
0 1970
3.2.4 In Bone
0.00 p.p.m.NA
Plutonium Metal
0 170000
4 Physical
4.1 Melting Point
1,227.00 °C1,356.00 °C
Francium Metal
27 3410
4.2 Boiling Point
3,200.00 °C3,123.00 °C
Flerovium Metal
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silvery White
Silvery White
4.3.3 Luster
NA
Metallic
4.4 Hardness
4.4.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
4.4.2 Brinell Hardness
NA677.00 MPa
Cesium Metal
0.14 3490
4.4.3 Vickers Hardness
NA863.00 MPa
Palladium Metal
121 3430
4.5 Speed of Sound
NA2,620.00 m/s
Thallium Metal
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
4.6.2 Reflectivity
NANA
Molybdenum Metal
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
Ac
Tb
5.2 Isotopes
5.2.1 Known Isotopes
2926
Tennessine Metal
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.10NA
Francium Metal
0.7 2.54
5.3.2 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.001.10
Cesium Metal
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NANA
Cesium Metal
0.62 2.48
5.3.5 Allen Electronegativity
NANA
Cesium Metal
0.659 2.7
1.3 Electropositivity
1.3.1 Pauling Electropositivity
2.90NA
Gold Metal
1.46 3.3
1.5 Ionization Energies
1.5.1 1st Energy Level
499.00 kJ/mol603.40 kJ/mol
Cesium Metal
375.7 26130
1.5.2 2nd Energy Level
1,170.00 kJ/mol1,174.80 kJ/mol
Ruthenium Metal
710.2162 28750
1.8.1 3rd Energy Level
1,900.00 kJ/mol2,417.00 kJ/mol
Osmium Metal
1600 34230
1.10.1 4th Energy Level
4,700.00 kJ/mol4,203.00 kJ/mol
Thorium Metal
2780 37066
1.10.2 5th Energy Level
NANA
Dubnium Metal
4305.2 97510
1.10.3 6th Energy Level
NANA
Seaborgium Metal
5715.8 105800
1.10.4 7th Energy level
NANA
Bohrium Metal
7226.8 114300
1.10.5 8th Energy Level
NANA
Hassium Metal
8857.4 125300
1.10.6 9th Energy Level
NANA
Yttrium Metal
14110 134700
1.10.7 10th Energy Level
NANA
Strontium Metal
17100 144300
1.10.8 11th Energy Level
NANA
Yttrium Metal
19900 169988
1.10.9 12th Energy Level
NANA
Molybdenum Metal
22219 189368
1.10.10 13th Energy Level
NANA
Molybdenum Metal
26930 76015
1.10.11 14th Energy Level
NANA
Molybdenum Metal
29196 86450
1.10.12 15th Energy Level
NANA
Manganese Metal
41987 97510
1.10.13 16th Energy Level
NANA
Iron Metal
47206 109480
1.10.14 17th Energy Level
NANA
Cobalt Metal
52737 122200
1.10.15 18th Energy Level
NANA
Nickel Metal
58570 134810
1.10.16 19th Energy Level
NANA
Copper Metal
64702 148700
1.10.17 20th Energy Level
NANA
Molybdenum Metal
80400 171200
1.10.18 21st Energy Level
NANA
Molybdenum Metal
87000 179100
1.10.19 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
1.10.20 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
1.10.21 24th Energy Level
NANA
Molybdenum Metal
104400 195200
1.10.22 25th Energy Level
NANA
Molybdenum Metal
121900 121900
1.10.23 26th Energy Level
NANA
Molybdenum Metal
127700 127700
1.10.24 27th Energy Level
NANA
Molybdenum Metal
133800 133800
1.10.25 28th Energy Level
NANA
Molybdenum Metal
139800 139800
1.10.26 29th Energy Level
NANA
Molybdenum Metal
148100 148100
1.10.27 30th Energy Level
NANA
Molybdenum Metal
154500 154500
1.11 Electrochemical Equivalent
2.82 g/amp-hr1.98 g/amp-hr
Beryllium Metal
0.16812 8.3209
1.12 Electron Work Function
NA3.00 eV
Cesium Metal
2.14 5.65
1.13 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
2 Atomic
2.1 Atomic Number
8965
Lithium Metal
3 117
2.2 Electron Configuration
[Rn] 6d1 7s2
[Xe] 4f9 6s2
2.3 Crystal Structure
Face Centered Cubic (FCC)
Hexagonal Close Packed (HCP)
2.3.1 Crystal Lattice
2.4 Atom
2.4.1 Number of Protons
8965
Lithium Metal
3 117
2.4.2 Number of Neutrons
13894
Lithium Metal
4 184
2.4.3 Number of Electrons
8965
Lithium Metal
3 117
2.5 Radius of an Atom
2.5.1 Atomic Radius
195.00 pm177.00 pm
Beryllium Metal
112 265
2.5.2 Covalent Radius
NA194.00 pm
Beryllium Metal
96 260
2.5.3 Van der Waals Radius
NA221.00 pm
Zinc Metal
139 348
2.6 Atomic Weight
227.00 amu158.93 amu
Lithium Metal
6.94 294
2.7 Atomic Volume
22.54 cm3/mol19.20 cm3/mol
Manganese Metal
1.39 71.07
2.8 Adjacent Atomic Numbers
2.8.1 Previous Element
2.8.2 Next Element
2.9 Valence Electron Potential
38.60 (-eV)46.80 (-eV)
Francium Metal
8 392.42
2.10 Lattice Constant
567.00 pm360.10 pm
Beryllium Metal
228.58 891.25
2.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
2.12 Lattice C/A Ratio
NA1.58
Beryllium Metal
1.567 1.886
3 Mechanical
3.1 Density
3.1.1 Density At Room Temperature
10.00 g/cm38.23 g/cm3
Lithium Metal
0.534 40.7
3.1.2 Density When Liquid (at m.p.)
NA7.65 g/cm3
Lithium Metal
0.512 20
3.2 Tensile Strength
NA60.00 MPa
Indium Metal
2.5 11000
3.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
3.4 Vapor Pressure
3.4.1 Vapor Pressure at 1000 K
NA0.00 (Pa)
Cerium Metal
2.47E-11 121
3.4.2 Vapor Pressure at 2000 K
NA12.50 (Pa)
Tungsten Metal
2.62E-10 774
3.5 Elasticity properties
3.5.1 Shear Modulus
NA22.10 GPa
Potassium Metal
1.3 222
3.5.2 Bulk Modulus
NA38.70 GPa
Cesium Metal
1.6 462
3.5.3 Young's Modulus
NA55.70 GPa
Cesium Metal
1.7 528
3.6 Poisson Ratio
NA0.26
Beryllium Metal
0.032 0.47
3.7 Other Mechanical Properties
NA
Ductile, Malleable
4 Magnetic
4.1 Magnetic Characteristics
4.1.1 Specific Gravity
10.078.23
Lithium Metal
0.53 4500
4.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
4.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
4.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
4.2 Electrical Properties
4.2.1 Electrical Property
Unknown
Conductor
4.2.2 Resistivity
NA1.15 nΩ·m
Thallium Metal
0.18 961
4.2.3 Electrical Conductivity
NA0.01 106/cm Ω
Plutonium Metal
0.00666 0.63
4.2.4 Electron Affinity
NA50.00 kJ/mol
Mercury Metal
0 222.8
5 Thermal
5.1 Specific Heat
0.12 J/(kg K)0.18 J/(kg K)
Americium Metal
0.11 3.6
5.2 Molar Heat Capacity
27.20 J/mol·K28.91 J/mol·K
Beryllium Metal
16.443 62.7
5.3 Thermal Conductivity
12.00 W/m·K11.10 W/m·K
Neptunium Metal
6.3 429
5.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
5.5 Thermal Expansion
NA10.30 µm/(m·K)
Tungsten Metal
4.5 97
5.6 Enthalpy
5.6.1 Enthalpy of Vaporization
NA330.90 kJ/mol
Zinc Metal
7.32 799.1
5.6.2 Enthalpy of Fusion
NA10.80 kJ/mol
Cesium Metal
2.1 35.23
5.6.3 Enthalpy of Atomization
301.00 kJ/mol314.00 kJ/mol
Mercury Metal
61.5 837
5.7 Standard Molar Entropy
56.50 J/mol.K73.20 J/mol.K
Beryllium Metal
9.5 198.1