Home
 Compare Metals

Actinium vs Radium

Actinium
Radium
Radium vs Actinium


Periodic Table
Symbol
Ac  
Ra  
Group Number
3  
15
2  
16
Period Number
7  
7  
Block
f block  
s block  
Element Family
Actinide  
Alkaline Earth  
CAS Number
7440348  
99+
7440144  
99+
Space Group Name
Fm_ 3m  
Im_ 3m  
Space Group Number
225.00  
3
229.00  
2
Facts
Interesting Facts
Actinium glows in the dark due to its radioactivity.  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Obtained by Treating Radium with Neutrons, Ores of metals  
Mining, Ores of metals  
History
  
  
Who Discovered
Friedrich Oskar Giesel  
-  
Discovery
In 1902  
In 1898  
Abundance
  
  
Abundance In Universe
0.00 %  
34
0.00 %  
40
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
99+
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
23
Uses
Uses & Benefits
  • Actinium metal has a great source of alpha rays but it is hardly used outside research purpose.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
-  
-  
Medical Uses
-  
Pharmaceutical Industry  
Other Uses
Alloys, Nuclear Research, Research Purposes  
-  
Biological Properties
  
  
Toxicity
Toxic  
Highly Toxic  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
34
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,227.00 °C  
38
700.00 °C  
99+
Boiling Point
3,200.00 °C  
27
1,737.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
-  
Metallic  
Hardness
  
  
Mohs Hardness
6.50  
5
1.00  
22
Brinell Hardness
70.00 MPa  
99+
700.00 MPa  
17
Vickers Hardness
260.00 MPa  
99+
140.00 MPa  
99+
Speed of Sound
3,430.00 m/s  
32
3,150.00 m/s  
37
Optical Properties
  
  
Refractive Index
1.00  
99+
1.00  
99+
Reflectivity
62.00 %  
21
83.00 %  
6
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ac  
Ra  
Isotopes
  
  
Known Isotopes
29  
10
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.10  
99+
0.90  
99+
Sanderson Electronegativity
1.10  
38
0.89  
99+
Allred Rochow Electronegativity
1.00  
37
0.97  
39
Mulliken-Jaffe Electronegativity
1.10  
99+
0.92  
99+
Allen Electronegativity
1.10  
99+
0.89  
99+
Electropositivity
  
  
Pauling Electropositivity
2.90  
10
3.10  
5
Ionization Energies
  
  
1st Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
2nd Energy Level
1,170.00 kJ/mol  
99+
979.00 kJ/mol  
99+
3rd Energy Level
1,900.00 kJ/mol  
99+
509.30 kJ/mol  
99+
4th Energy Level
4,700.00 kJ/mol  
33
5,093.00 kJ/mol  
27
5th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
6th Energy Level
5,750.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
7th Energy level
5,750.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
8th Energy Level
5,750.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
9th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
10th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
11th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
12th Energy Level
49,900.00 kJ/mol  
21
5,090.00 kJ/mol  
99+
13th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
14th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
15th Energy Level
49,900.00 kJ/mol  
99+
50,900.00 kJ/mol  
99+
16th Energy Level
49,900.00 kJ/mol  
99+
50,900.00 kJ/mol  
99+
17th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
18th Energy Level
4,990.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
19th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
20th Energy Level
499.00 kJ/mol  
99+
509.00 kJ/mol  
99+
21st Energy Level
4,990.00 kJ/mol  
25
509.30 kJ/mol  
99+
22nd Energy Level
499.00 kJ/mol  
99+
509.00 kJ/mol  
99+
23rd Energy Level
4,990.00 kJ/mol  
29
509.30 kJ/mol  
99+
24th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
25th Energy Level
499.00 kJ/mol  
99+
509.00 kJ/mol  
99+
26th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
27th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
28th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
29th Energy Level
499.00 kJ/mol  
99+
509.30 kJ/mol  
99+
30th Energy Level
499.00 kJ/mol  
99+
509.00 kJ/mol  
99+
Electrochemical Equivalent
2.82 g/amp-hr  
22
4.22 g/amp-hr  
6
Electron Work Function
4.38 eV  
23
4.30 eV  
25
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
89  
29
88  
30
Electron Configuration
[Rn] 6d1 7s2  
[Rn] 7s2  
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
88  
30
Number of Neutrons
138  
17
138  
17
Number of Electrons
89  
29
88  
30
Radius of an Atom
  
  
Atomic Radius
195.00 pm  
9
215.00 pm  
6
Covalent Radius
186.00 pm  
21
221.00 pm  
3
Van der Waals Radius
215.00 pm  
31
283.00 pm  
5
Atomic Weight
227.00 amu  
25
226.00 amu  
26
Atomic Volume
22.54 cm3/mol  
20
45.20 cm3/mol  
5
Adjacent Atomic Numbers
  
  
Previous Element
Radium
  
Francium
  
Next Element
Thorium
  
Actinium
  
Valence Electron Potential
38.60 (-eV)  
99+
20.10 (-eV)  
99+
Lattice Constant
567.00 pm  
9
514.80 pm  
15
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.89  
2
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.00 g/cm3  
40
5.50 g/cm3  
99+
Density When Liquid (at m.p.)
10.07 g/cm3  
40
5.50 g/cm3  
99+
Tensile Strength
65.00 MPa  
33
40.00 MPa  
99+
Viscosity
0.00  
25
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
33
Elasticity properties
  
  
Shear Modulus
25.00 GPa  
38
25.00 GPa  
38
Bulk Modulus
94.00 GPa  
17
43.00 GPa  
33
Young's Modulus
130.00 GPa  
16
83.00 GPa  
25
Poisson Ratio
0.34  
10
0.31  
13
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.07  
99+
5.00  
99+
Magnetic Ordering
Paramagnetic  
Nonmagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
9
Susceptibility
0.00  
24
0.00  
18
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
5.20 nΩ·m  
99+
100.00 nΩ·m  
31
Electrical Conductivity
0.15 106/cm Ω  
13
0.00 106/cm Ω  
99+
Electron Affinity
33.20 kJ/mol  
34
0.90 kJ/mol  
99+
Thermal
Specific Heat
0.12 J/(kg K)  
99+
0.12 J/(kg K)  
99+
Molar Heat Capacity
27.20 J/mol·K  
24
20.05 J/mol·K  
99+
Thermal Conductivity
12.00 W/m·K  
99+
18.60 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
973.00 K  
99+
Thermal Expansion
12.10 µm/(m·K)  
99+
8.50 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
120.00 kJ/mol  
99+
113.00 kJ/mol  
99+
Enthalpy of Fusion
14.20 kJ/mol  
28
8.60 kJ/mol  
99+
Enthalpy of Atomization
301.00 kJ/mol  
99+
163.00 kJ/mol  
99+
Standard Molar Entropy
56.50 J/mol.K  
33
71.00 J/mol.K  
14
Periodic Table >>
<< All

Compare Actinide Series

Actinide Series

Actinide Series

» More Actinide Series

Compare Actinide Series

» More Compare Actinide Series
Home | About | Contact | Disclaimer | Terms of use
© A softusvista inc. venture!