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Radium Silver Comparison

Radium
Silver
Silver Radium comparison


Periodic Table
Symbol
Ra   
Ag   
Group Number
2   
16
11   
7
Period Number
7   
5   
Block
s block   
d block   
Element Family
Alkaline Earth   
Transition Metal   
CAS Number
7440144   
99+
7440224   
99+
Space Group Name
Im_ 3m   
Fm_ 3m   
Space Group Number
229.00   
1
225.00   
2
Facts
Interesting Facts
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
  • It is the most reflective element.
  • Silver is the second most ductile metal after Gold.
  • It is also used in Dentistry as a dental alloys for clips and crowning.
  
Sources
Mining, Ores of metals   
Earth's crust, Found in Minerals, Ores of metals   
History
  
  
Who Discovered
Not Available   
Unknown   
Discovery
In 1898   
Before 5000 BC   
Abundance
  
  
Abundance In Universe
Not Available   
6 * 10-8 %   
26
Abundance In Sun
~-9999 %   
~0.0000001 %   
26
Abundance In Meteorites
Not Available   
0.00 %   
38
Abundance In Earth's Crust
0.00 %   
99+
0.00 %   
99+
Abundance In Oceans
0.00 %   
99+
0.00 %   
19
Abundance In Humans
0.00 %   
20
Not Available   
Uses
Uses & Benefits
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
Industrial Uses
NA   
Chemical Industry, Clothing Industry, Electrical Industry   
Medical Uses
Pharmaceutical Industry   
Dentistry, Pharmaceutical Industry   
Other Uses
NA   
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Highly Toxic   
Non Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
0.00 Blood/mg dm-3   
29
In Bone
Not Available   
0.44 p.p.m.   
20
Physical Properties
Melting Point
700.00 °C   
99+
961.93 °C   
99+
Boiling Point
1,737.00 °C   
99+
2,212.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery White   
Luster
Metallic   
Metallic   
Hardness
  
  
Mohs Hardness
Not Available   
2.50   
14
Brinell Hardness
Not Available   
251.00 MPa   
37
Vickers Hardness
Not Available   
229.00 MPa   
30
Speed of Sound
Not Available   
2,680.00 m/s   
34
Optical Properties
  
  
Reflectivity
Not Available   
97.00 %   
1
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
Ra   
Ag   
Isotopes
  
  
Known Isotopes
33   
6
36   
3
Electronegativity
  
  
Pauling Electronegativity
0.90   
99+
1.93   
9
Sanderson Electronegativity
Not Available   
1.83   
11
Allred Rochow Electronegativity
0.97   
38
1.42   
18
Mulliken-Jaffe Electronegativity
0.92   
20
1.47   
15
Allen Electronegativity
0.89   
99+
1.87   
7
Electropositivity
  
  
Pauling Electropositivity
3.10   
5
2.07   
99+
Ionization Energies
  
  
1st Energy Level
509.30 kJ/mol   
99+
731.00 kJ/mol   
27
2nd Energy Level
979.00 kJ/mol   
99+
2,070.00 kJ/mol   
11
3rd Energy Level
Not Available   
3,361.00 kJ/mol   
19
Electrochemical Equivalent
4.22 g/amp-hr   
6
4.02 g/amp-hr   
7
Electron Work Function
Not Available   
4.26 eV   
20
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Chemical Stability, Ionization, Solubility   
Atomic Properties
Atomic Number
88   
30
47   
99+
Electron Configuration
[Rn] 7s2   
[Kr] 4d10 5s1   
Crystal Structure
Body Centered Cubic (BCC)   
Face Centered Cubic (FCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
FCC-Crystal-Structure-of-Silver.jpg#100   
Atom
  
  
Number of Protons
88   
30
47   
99+
Number of Neutrons
138   
16
61   
99+
Number of Electrons
88   
30
47   
99+
Radius of an Atom
  
  
Atomic Radius
Not Available   
144.00 pm   
36
Covalent Radius
221.00 pm   
3
145.00 pm   
39
Van der Waals Radius
283.00 pm   
4
172.00 pm   
38
Atomic Weight
226.00 amu   
26
107.87 amu   
99+
Atomic Volume
45.20 cm3/mol   
4
10.30 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Francium
  
Palladium
  
Next Element
Actinium
  
Cadmium
  
Valence Electron Potential
20.10 (-eV)   
99+
11.40 (-eV)   
99+
Lattice Constant
514.80 pm   
13
408.53 pm   
20
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
5.50 g/cm3   
99+
10.49 g/cm3   
35
Density When Liquid (at m.p.)
Not Available   
9.32 g/cm3   
21
Tensile Strength
Not Available   
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
14
Elasticity properties
  
  
Shear Modulus
Not Available   
30.00 GPa   
23
Bulk Modulus
Not Available   
100.00 GPa   
16
Young's Modulus
Not Available   
83.00 GPa   
23
Poisson Ratio
Not Available   
0.37   
7
Other Mechanical Properties
NA   
Ductile, Malleable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
5.00   
99+
10.50   
26
Magnetic Ordering
Nonmagnetic   
Diamagnetic   
Susceptibility
Not Available   
0.00   
5
Electrical Properties
  
  
Electrical Property
NA   
Conductor   
Resistivity
100.00 nΩ·m   
31
15.87 nΩ·m   
99+
Electrical Conductivity
Not Available   
0.63 106/cm Ω   
1
Electron Affinity
Not Available   
125.60 kJ/mol   
5
Thermal Properties
Specific Heat
0.12 J/(kg K)   
40
0.24 J/(kg K)   
25
Molar Heat Capacity
Not Available   
25.35 J/mol·K   
99+
Thermal Conductivity
18.60 W/m·K   
99+
429.00 W/m·K   
1
Critical Temperature
Not Available   
Not Available   
Thermal Expansion
Not Available   
18.90 µm/(m·K)   
23
Enthalpy
  
  
Enthalpy of Vaporization
Not Available   
255.10 kJ/mol   
37
Enthalpy of Fusion
Not Available   
11.30 kJ/mol   
31
Enthalpy of Atomization
163.00 kJ/mol   
99+
284.50 kJ/mol   
37
Standard Molar Entropy
71.00 J/mol.K   
14
42.60 J/mol.K   
35
Summary >>
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