Actinium Europium Comparison
Periodic Table
Symbol
Ac
Eu
Group Number
Not Available
Not Available
Period Number
7
6
Block
f block
f block
Element Family
Actinide
Lanthanide
CAS Number
7440348
99+
7440531
34
Space Group Name
Fm_ 3m
Im_ 3m
Space Group Number
225.00
2
229.00
1
Facts
Interesting Facts
Not Available
Not Available
Sources
Obtained by Treating Radium with Neutrons, Ores of metals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Friedrich Oskar Giesel
Eugène-Anatole Demarçay
Discovery
In 1902
In 1896
Abundance
Abundance In Universe
Not Available
5 * 10-8 %
27
Abundance In Sun
~-9999 %
~0.00000005 %
27
Abundance In Meteorites
Not Available
0.00 %
99+
Abundance In Earth's Crust
Not Available
0.00 %
36
Abundance In Oceans
Not Available
0.00 %
99+
Uses
Uses & Benefits
- Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
- Europium metals main uses is in the printing of euro banknotes. These notes glow red under UV light.
- It is used in low energy light bulbs.
Industrial Uses
NA
Chemical Industry
Medical Uses
NA
NA
Other Uses
Alloys, Nuclear Research, Research Purposes
Alloys
Biological Properties
Toxicity
Toxic
Non Toxic
Present in Human Body
No
Yes
In Blood
0.00 Blood/mg dm-3
37
Not Available
In Bone
0.00 p.p.m.
36
Not Available
Physical Properties
Melting Point
1,227.00 °C
38
822.00 °C
99+
Boiling Point
3,200.00 °C
26
1,597.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
NA
Lustrous
Hardness
Vickers Hardness
Not Available
167.00 MPa
34
Speed of Sound
Not Available
Not Available
Optical Properties
Allotropes
No
No
α Allotropes
Not Available
Not Available
β Allotropes
Not Available
Not Available
γ Allotropes
Not Available
Not Available
Chemical Properties
Chemical Formula
Ac
Eu
Isotopes
Known Isotopes
29
10
31
8
Electronegativity
Pauling Electronegativity
1.10
99+
1.20
39
Sanderson Electronegativity
Not Available
1.01
22
Allred Rochow Electronegativity
1.00
36
Not Available
Electropositivity
Pauling Electropositivity
2.90
10
Not Available
Ionization Energies
1st Energy Level
499.00 kJ/mol
99+
547.10 kJ/mol
99+
2nd Energy Level
1,170.00 kJ/mol
99+
1,085.00 kJ/mol
99+
3rd Energy Level
1,900.00 kJ/mol
99+
2,404.00 kJ/mol
99+
4th Energy Level
4,700.00 kJ/mol
23
4,120.00 kJ/mol
33
Electrochemical Equivalent
2.82 g/amp-hr
18
1.89 g/amp-hr
33
Electron Work Function
Not Available
2.50 eV
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Ionization, Radioactive Isotopes, Solubility
Atomic Properties
Atomic Number
89
29
63
99+
Electron Configuration
[Rn] 6d1 7s2
[Xe] 4f7 6s2
Crystal Structure
Face Centered Cubic (FCC)
Body Centered Cubic (BCC)
Crystal Lattice
FCC-Crystal-Structure-of-Actinium.jpg#100
BCC-Crystal-Structure-.jpg#100
Atom
Number of Protons
89
29
63
99+
Number of Neutrons
138
16
89
38
Number of Electrons
89
29
63
99+
Radius of an Atom
Atomic Radius
195.00 pm
7
180.00 pm
14
Covalent Radius
Not Available
198.00 pm
13
Van der Waals Radius
Not Available
233.00 pm
18
Atomic Weight
227.00 amu
25
151.96 amu
99+
Atomic Volume
22.54 cm3/mol
11
28.90 cm3/mol
8
Adjacent Atomic Numbers
Valence Electron Potential
38.60 (-eV)
99+
45.60 (-eV)
35
Lattice Constant
567.00 pm
8
458.10 pm
17
Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
Lattice C/A Ratio
Not Available
Not Available
Mechanical Properties
Density
Density At Room Temperature
10.00 g/cm3
37
5.26 g/cm3
99+
Density When Liquid (at m.p.)
Not Available
5.13 g/cm3
99+
Tensile Strength
Not Available
120.00 MPa
15
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
Not Available
19.40 (Pa)
4
Elasticity properties
Shear Modulus
Not Available
7.90 GPa
99+
Bulk Modulus
Not Available
8.30 GPa
99+
Young's Modulus
Not Available
18.20 GPa
99+
Poisson Ratio
Not Available
0.15
34
Other Mechanical Properties
NA
Ductile
Magnetic Properties
Magnetic Characteristics
Specific Gravity
10.07
28
5.24
99+
Magnetic Ordering
Paramagnetic
Paramagnetic
Electrical Properties
Electrical Property
Unknown
Conductor
Resistivity
Not Available
0.90 nΩ·m
99+
Electrical Conductivity
Not Available
0.01 106/cm Ω
99+
Electron Affinity
Not Available
50.00 kJ/mol
21
Thermal Properties
Specific Heat
0.12 J/(kg K)
40
0.18 J/(kg K)
33
Molar Heat Capacity
27.20 J/mol·K
18
27.66 J/mol·K
16
Thermal Conductivity
12.00 W/m·K
99+
13.90 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
Not Available
35.00 µm/(m·K)
8
Enthalpy
Enthalpy of Vaporization
Not Available
143.50 kJ/mol
99+
Enthalpy of Fusion
Not Available
9.21 kJ/mol
37
Enthalpy of Atomization
301.00 kJ/mol
36
180.00 kJ/mol
99+
Standard Molar Entropy
56.50 J/mol.K
25
77.80 J/mol.K
4
|
||
|
||
|
