×

Actinium
Actinium

Erbium
Erbium



ADD
Compare
X
Actinium
X
Erbium

Actinium Erbium Comparison

Add ⊕
1 Periodic Table
1.1 Symbol
Ac
Er
1.2 Group Number
NANA
Gadolinium Metal
0 17
2.3 Period Number
76
Lithium Metal
2 7
2.7 Block
f block
f block
2.8 Element Family
Actinide
Lanthanide
2.9 CAS Number
74403487440520
Aluminium Metal
7429905 54386242
2.10 Space Group Name
Fm_ 3m
P63/mmc
2.11 Space Group Number
225.00194.00
Plutonium Metal
11 229
3 Facts
3.1 Interesting Facts
Not Available
  • Erbium metal is used as alloyed with Vanadium to make it softer.
  • Recent studies shows that it is helpful for metabolism.
3.2 Sources
Obtained by Treating Radium with Neutrons, Ores of metals
Mining
3.3 History
3.3.1 Who Discovered
Friedrich Oskar Giesel
Carl Gustaf Mosander
3.3.2 Discovery
In 1902
In 1842
3.4 Abundance
3.4.1 Abundance In Universe
NA2 * 10-7 %
Thallium Metal
5E-09 0.11
3.5.1 Abundance In Sun
~-9999 %~0.0000001 %
Beryllium Metal
1E-08 0.1
3.8.1 Abundance In Meteorites
NA0.00 %
Gold Metal
1.7E-07 22
3.9.1 Abundance In Earth's Crust
NA0.00 %
Radium Metal
9.9E-12 8.1
3.12.1 Abundance In Oceans
NA0.00 %
Protactinium Metal
2E-23 1.1
4.1.2 Abundance In Humans
NANA
Radium Metal
1E-13 1.4
5 Uses
5.1 Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  • It has a tendency to get tarnished in the open air, but when alloyed with elements like erbium, vanadium, its hardness levels decreases.
  • Its compounds like Erbium oxide is used in safety glasses of welders and metal workers.
5.1.1 Industrial Uses
NA
Chemical Industry
5.1.2 Medical Uses
NA
NA
5.1.3 Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
5.2 Biological Properties
5.2.1 Toxicity
Toxic
Mildly Toxic
5.2.2 Present in Human Body
5.2.3 In Blood
0.00 Blood/mg dm-3NA
Plutonium Metal
0 1970
5.2.5 In Bone
0.00 p.p.m.NA
Plutonium Metal
0 170000
6 Physical
6.1 Melting Point
1,227.00 °C1,522.00 °C
Francium Metal
27 3410
6.5 Boiling Point
3,200.00 °C2,510.00 °C
Flerovium Metal
147 5660
7.2 Appearance
7.2.1 Physical State
Solid
Solid
7.2.2 Color
Silvery White
Silvery White
7.2.3 Luster
NA
Lustrous
7.3 Hardness
7.3.1 Mohs Hardness
NANA
Cesium Metal
0.2 8.5
7.5.1 Brinell Hardness
NA814.00 MPa
Cesium Metal
0.14 3490
7.7.3 Vickers Hardness
NA589.00 MPa
Palladium Metal
121 3430
7.9 Speed of Sound
NA2,830.00 m/s
Thallium Metal
818 16200
7.10 Optical Properties
7.10.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
7.12.1 Reflectivity
NANA
Molybdenum Metal
58 97
9.2 Allotropes
9.2.1 α Allotropes
Not Available
Not Available
9.2.2 β Allotropes
Not Available
Not Available
9.2.3 γ Allotropes
Not Available
Not Available
10 Chemical
10.1 Chemical Formula
Ac
Er
10.2 Isotopes
10.2.1 Known Isotopes
2931
Tennessine Metal
0 38
10.3 Electronegativity
10.3.1 Pauling Electronegativity
1.101.24
Francium Metal
0.7 2.54
10.4.4 Sanderson Electronegativity
NANA
Cesium Metal
0.22 2.56
10.5.4 Allred Rochow Electronegativity
1.001.11
Cesium Metal
0.86 1.82
11.1.2 Mulliken-Jaffe Electronegativity
NANA
Cesium Metal
0.62 2.48
11.3.1 Allen Electronegativity
NANA
Cesium Metal
0.659 2.7
11.5 Electropositivity
11.5.1 Pauling Electropositivity
2.902.76
Gold Metal
1.46 3.3
12.2 Ionization Energies
12.2.1 1st Energy Level
499.00 kJ/mol589.30 kJ/mol
Cesium Metal
375.7 26130
12.4.2 2nd Energy Level
1,170.00 kJ/mol1,150.00 kJ/mol
Ruthenium Metal
710.2162 28750
12.5.1 3rd Energy Level
1,900.00 kJ/mol2,194.00 kJ/mol
Osmium Metal
1600 34230
12.6.1 4th Energy Level
4,700.00 kJ/mol4,120.00 kJ/mol
Thorium Metal
2780 37066
12.7.1 5th Energy Level
NANA
Dubnium Metal
4305.2 97510
12.8.1 6th Energy Level
NANA
Seaborgium Metal
5715.8 105800
12.9.2 7th Energy level
NANA
Bohrium Metal
7226.8 114300
12.9.3 8th Energy Level
NANA
Hassium Metal
8857.4 125300
12.9.5 9th Energy Level
NANA
Yttrium Metal
14110 134700
12.9.6 10th Energy Level
NANA
Strontium Metal
17100 144300
12.9.8 11th Energy Level
NANA
Yttrium Metal
19900 169988
12.10.1 12th Energy Level
NANA
Molybdenum Metal
22219 189368
12.10.2 13th Energy Level
NANA
Molybdenum Metal
26930 76015
12.10.3 14th Energy Level
NANA
Molybdenum Metal
29196 86450
12.10.4 15th Energy Level
NANA
Manganese Metal
41987 97510
12.10.5 16th Energy Level
NANA
Iron Metal
47206 109480
12.10.6 17th Energy Level
NANA
Cobalt Metal
52737 122200
12.10.7 18th Energy Level
NANA
Nickel Metal
58570 134810
12.10.8 19th Energy Level
NANA
Copper Metal
64702 148700
12.10.9 20th Energy Level
NANA
Molybdenum Metal
80400 171200
12.10.10 21st Energy Level
NANA
Molybdenum Metal
87000 179100
12.10.11 22nd Energy Level
NANA
Molybdenum Metal
93400 184900
12.10.12 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
12.10.13 24th Energy Level
NANA
Molybdenum Metal
104400 195200
12.10.14 25th Energy Level
NANA
Molybdenum Metal
121900 121900
12.10.15 26th Energy Level
NANA
Molybdenum Metal
127700 127700
12.10.16 27th Energy Level
NANA
Molybdenum Metal
133800 133800
12.10.17 28th Energy Level
NANA
Molybdenum Metal
139800 139800
12.10.18 29th Energy Level
NANA
Molybdenum Metal
148100 148100
12.10.19 30th Energy Level
NANA
Molybdenum Metal
154500 154500
12.11 Electrochemical Equivalent
2.82 g/amp-hr2.08 g/amp-hr
Beryllium Metal
0.16812 8.3209
12.12 Electron Work Function
NANA
Cesium Metal
2.14 5.65
12.13 Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
13 Atomic
13.1 Atomic Number
8968
Lithium Metal
3 117
13.2 Electron Configuration
[Rn] 6d1 7s2
[Xe] 4f12 6s2
13.3 Crystal Structure
Face Centered Cubic (FCC)
Hexagonal Close Packed (HCP)
13.3.1 Crystal Lattice
13.4 Atom
13.4.1 Number of Protons
8968
Lithium Metal
3 117
13.4.2 Number of Neutrons
13899
Lithium Metal
4 184
13.4.3 Number of Electrons
8968
Lithium Metal
3 117
13.5 Radius of an Atom
13.5.1 Atomic Radius
195.00 pm176.00 pm
Beryllium Metal
112 265
13.5.2 Covalent Radius
NA189.00 pm
Beryllium Metal
96 260
13.5.3 Van der Waals Radius
NANA
Zinc Metal
139 348
13.6 Atomic Weight
227.00 amu167.26 amu
Lithium Metal
6.94 294
13.7 Atomic Volume
22.54 cm3/mol18.40 cm3/mol
Manganese Metal
1.39 71.07
13.8 Adjacent Atomic Numbers
13.8.1 Previous Element
13.8.2 Next Element
13.9 Valence Electron Potential
38.60 (-eV)49.00 (-eV)
Francium Metal
8 392.42
13.10 Lattice Constant
567.00 pm355.88 pm
Beryllium Metal
228.58 891.25
13.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, 2 π/3
13.12 Lattice C/A Ratio
NA1.57
Beryllium Metal
1.567 1.886
14 Mechanical
14.1 Density
14.1.1 Density At Room Temperature
10.00 g/cm39.07 g/cm3
Lithium Metal
0.534 40.7
14.1.2 Density When Liquid (at m.p.)
NA8.86 g/cm3
Lithium Metal
0.512 20
14.2 Tensile Strength
NANA
Indium Metal
2.5 11000
14.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
14.4 Vapor Pressure
14.4.1 Vapor Pressure at 1000 K
NA0.00 (Pa)
Cerium Metal
2.47E-11 121
14.4.2 Vapor Pressure at 2000 K
NANA
Tungsten Metal
2.62E-10 774
14.5 Elasticity properties
14.5.1 Shear Modulus
NA28.30 GPa
Potassium Metal
1.3 222
14.5.2 Bulk Modulus
NA44.40 GPa
Cesium Metal
1.6 462
14.5.3 Young's Modulus
NA69.90 GPa
Cesium Metal
1.7 528
14.6 Poisson Ratio
NA0.24
Beryllium Metal
0.032 0.47
14.7 Other Mechanical Properties
NA
Malleable
15 Magnetic
15.1 Magnetic Characteristics
15.1.1 Specific Gravity
10.079.07
Lithium Metal
0.53 4500
15.1.2 Magnetic Ordering
Paramagnetic
Paramagnetic
15.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
15.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
15.2 Electrical Properties
15.2.1 Electrical Property
Unknown
Conductor
15.2.2 Resistivity
NA0.86 nΩ·m
Thallium Metal
0.18 961
15.2.3 Electrical Conductivity
NA0.01 106/cm Ω
Plutonium Metal
0.00666 0.63
15.2.4 Electron Affinity
NA50.00 kJ/mol
Mercury Metal
0 222.8
16 Thermal
16.1 Specific Heat
0.12 J/(kg K)0.17 J/(kg K)
Americium Metal
0.11 3.6
16.2 Molar Heat Capacity
27.20 J/mol·K28.12 J/mol·K
Beryllium Metal
16.443 62.7
16.3 Thermal Conductivity
12.00 W/m·K14.50 W/m·K
Neptunium Metal
6.3 429
16.4 Critical Temperature
NANA
Ytterbium Metal
26.3 3223
16.5 Thermal Expansion
NA12.20 µm/(m·K)
Tungsten Metal
4.5 97
16.6 Enthalpy
16.6.1 Enthalpy of Vaporization
NA261.00 kJ/mol
Zinc Metal
7.32 799.1
16.6.2 Enthalpy of Fusion
NA17.20 kJ/mol
Cesium Metal
2.1 35.23
16.6.3 Enthalpy of Atomization
301.00 kJ/mol314.00 kJ/mol
Mercury Metal
61.5 837
16.7 Standard Molar Entropy
56.50 J/mol.K73.10 J/mol.K
Beryllium Metal
9.5 198.1