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Silver vs Radium

Silver
Radium
Radium vs Silver


Periodic Table
Symbol
Ag  
Ra  
Group Number
11  
7
2  
16
Period Number
5  
7  
Block
d block  
s block  
Element Family
Transition Metal  
Alkaline Earth  
CAS Number
7440224  
99+
7440144  
99+
Space Group Name
Fm_ 3m  
Im_ 3m  
Space Group Number
225.00  
3
229.00  
2
Facts
Interesting Facts
  • 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.
  
  • Radium metal is the heaviest metal of Alkaline earth metals column.
  • Radium metal is highly radioactive and does not have any stable isotopes.
  
Sources
Earth's crust, Found in Minerals, Ores of metals  
Mining, Ores of metals  
History
  
  
Who Discovered
-  
-  
Discovery
Before 5000 BC  
In 1898  
Abundance
  
  
Abundance In Universe
0.00 %  
27
0.00 %  
40
Abundance In Sun
0.00 %  
26
0.00 %  
26
Abundance In Meteorites
0.00 %  
38
-  
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
0.00 %  
19
0.00 %  
99+
Abundance In Humans
0.00 %  
24
0.00 %  
23
Uses
Uses & Benefits
  • Silver is mainly used for Jewelry and show piece.
  • It is used for manufacturing high quality mirrors due to its reflectivity property.
  
  • It is a highly radioactive metal; and sometime Radium-223 is used to treat prostate cancer.
  • It is used in luminous paints.
  
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry  
-  
Medical Uses
Dentistry, Pharmaceutical Industry  
Pharmaceutical Industry  
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
-  
Biological Properties
  
  
Toxicity
Non Toxic  
Highly Toxic  
Present in Human Body
Yes  
No  
In Blood
0.00 Blood/mg dm-3  
29
0.00 Blood/mg dm-3  
34
In Bone
0.44 p.p.m.  
24
0.00 p.p.m.  
99+
Physical
Melting Point
961.93 °C  
99+
700.00 °C  
99+
Boiling Point
2,212.00 °C  
99+
1,737.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
Silvery White  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
2.50  
15
1.00  
22
Brinell Hardness
251.00 MPa  
99+
700.00 MPa  
17
Vickers Hardness
229.00 MPa  
99+
140.00 MPa  
99+
Speed of Sound
2,680.00 m/s  
99+
3,150.00 m/s  
37
Optical Properties
  
  
Refractive Index
0.16  
99+
1.00  
99+
Reflectivity
97.00 %  
1
83.00 %  
6
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Ag  
Ra  
Isotopes
  
  
Known Isotopes
36  
3
33  
6
Electronegativity
  
  
Pauling Electronegativity
1.93  
10
0.90  
99+
Sanderson Electronegativity
1.83  
14
0.89  
99+
Allred Rochow Electronegativity
1.42  
19
0.97  
39
Mulliken-Jaffe Electronegativity
1.47  
28
0.92  
99+
Allen Electronegativity
1.87  
10
0.89  
99+
Electropositivity
  
  
Pauling Electropositivity
2.07  
99+
3.10  
5
Ionization Energies
  
  
1st Energy Level
731.00 kJ/mol  
27
509.30 kJ/mol  
99+
2nd Energy Level
2,070.00 kJ/mol  
11
979.00 kJ/mol  
99+
3rd Energy Level
3,361.00 kJ/mol  
19
509.30 kJ/mol  
99+
4th Energy Level
7,310.00 kJ/mol  
10
5,093.00 kJ/mol  
27
5th Energy Level
7,310.00 kJ/mol  
24
5,090.00 kJ/mol  
99+
6th Energy Level
7,310.00 kJ/mol  
39
5,090.00 kJ/mol  
99+
7th Energy level
7,310.00 kJ/mol  
33
5,090.00 kJ/mol  
99+
8th Energy Level
7,310.00 kJ/mol  
31
5,090.00 kJ/mol  
99+
9th Energy Level
7,310.00 kJ/mol  
27
5,090.00 kJ/mol  
99+
10th Energy Level
7,310.00 kJ/mol  
32
5,090.00 kJ/mol  
99+
11th Energy Level
7,310.00 kJ/mol  
31
5,090.00 kJ/mol  
99+
12th Energy Level
7,310.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
13th Energy Level
7,310.00 kJ/mol  
25
5,090.00 kJ/mol  
99+
14th Energy Level
731.00 kJ/mol  
99+
5,090.00 kJ/mol  
99+
15th Energy Level
73,100.00 kJ/mol  
22
50,900.00 kJ/mol  
99+
16th Energy Level
73,100.00 kJ/mol  
17
50,900.00 kJ/mol  
99+
17th Energy Level
731.00 kJ/mol  
38
509.30 kJ/mol  
99+
18th Energy Level
7,310.00 kJ/mol  
28
5,090.00 kJ/mol  
99+
19th Energy Level
731.00 kJ/mol  
35
509.30 kJ/mol  
99+
20th Energy Level
731.00 kJ/mol  
29
509.00 kJ/mol  
99+
21st Energy Level
731.00 kJ/mol  
99+
509.30 kJ/mol  
99+
22nd Energy Level
731.00 kJ/mol  
23
509.00 kJ/mol  
99+
23rd Energy Level
731.00 kJ/mol  
99+
509.30 kJ/mol  
99+
24th Energy Level
731.00 kJ/mol  
22
509.30 kJ/mol  
99+
25th Energy Level
731.00 kJ/mol  
22
509.00 kJ/mol  
99+
26th Energy Level
731.00 kJ/mol  
22
509.30 kJ/mol  
99+
27th Energy Level
731.00 kJ/mol  
21
509.30 kJ/mol  
99+
28th Energy Level
731.00 kJ/mol  
27
509.30 kJ/mol  
99+
29th Energy Level
731.00 kJ/mol  
28
509.30 kJ/mol  
99+
30th Energy Level
731.00 kJ/mol  
22
509.00 kJ/mol  
99+
Electrochemical Equivalent
4.02 g/amp-hr  
7
4.22 g/amp-hr  
6
Electron Work Function
4.26 eV  
27
4.30 eV  
25
Other Chemical Properties
Chemical Stability, Ionization, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
47  
99+
88  
30
Electron Configuration
[Kr] 4d10 5s1  
[Rn] 7s2  
Crystal Structure
Face Centered Cubic (FCC)  
Body Centered Cubic (BCC)  
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
47  
99+
88  
30
Number of Neutrons
61  
99+
138  
17
Number of Electrons
47  
99+
88  
30
Radius of an Atom
  
  
Atomic Radius
144.00 pm  
38
215.00 pm  
6
Covalent Radius
145.00 pm  
99+
221.00 pm  
3
Van der Waals Radius
172.00 pm  
99+
283.00 pm  
5
Atomic Weight
107.87 amu  
99+
226.00 amu  
26
Atomic Volume
10.30 cm3/mol  
99+
45.20 cm3/mol  
5
Adjacent Atomic Numbers
  
  
Previous Element
Palladium
  
Francium
  
Next Element
Cadmium
  
Actinium
  
Valence Electron Potential
11.40 (-eV)  
99+
20.10 (-eV)  
99+
Lattice Constant
408.53 pm  
23
514.80 pm  
15
Lattice Angles
π/2, π/2, π/2  
π/2, π/2, π/2  
Lattice C/A Ratio
1.59  
26
1.57  
99+
Mechanical
Density
  
  
Density At Room Temperature
10.49 g/cm3  
37
5.50 g/cm3  
99+
Density When Liquid (at m.p.)
9.32 g/cm3  
99+
5.50 g/cm3  
99+
Tensile Strength
170.00 MPa  
21
40.00 MPa  
99+
Viscosity
0.00  
23
0.00  
2
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
14
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
38
0.00 (Pa)  
33
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
25.00 GPa  
38
Bulk Modulus
100.00 GPa  
16
43.00 GPa  
33
Young's Modulus
83.00 GPa  
25
83.00 GPa  
25
Poisson Ratio
0.37  
7
0.31  
13
Other Mechanical Properties
Ductile, Malleable  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
10.50  
39
5.00  
99+
Magnetic Ordering
Diamagnetic  
Nonmagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
9
Susceptibility
0.00  
32
0.00  
18
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
15.87 nΩ·m  
99+
100.00 nΩ·m  
31
Electrical Conductivity
0.63 106/cm Ω  
1
0.00 106/cm Ω  
99+
Electron Affinity
125.60 kJ/mol  
5
0.90 kJ/mol  
99+
Thermal
Specific Heat
0.24 J/(kg K)  
25
0.12 J/(kg K)  
99+
Molar Heat Capacity
25.35 J/mol·K  
99+
20.05 J/mol·K  
99+
Thermal Conductivity
429.00 W/m·K  
1
18.60 W/m·K  
99+
Critical Temperature
1,235.00 K  
99+
973.00 K  
99+
Thermal Expansion
18.90 µm/(m·K)  
25
8.50 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
255.10 kJ/mol  
99+
113.00 kJ/mol  
99+
Enthalpy of Fusion
11.30 kJ/mol  
37
8.60 kJ/mol  
99+
Enthalpy of Atomization
284.50 kJ/mol  
99+
163.00 kJ/mol  
99+
Standard Molar Entropy
42.60 J/mol.K  
99+
71.00 J/mol.K  
14
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