Silver vs Strontium
Periodic Table
Symbol
Ag
Sr
Group Number
11
7
2
16
Period Number
5
5
Block
d block
s block
Element Family
Transition Metal
Alkaline Earth
CAS Number
7440224
99+
7440246
99+
Space Group Name
Fm_ 3m
Fm_ 3m
Space Group Number
225.00
2
225.00
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.
- Strontium element is softer than Calcium.
- Silvery Strontium turns yellow, if exposed to air.
Sources
Earth's crust, Found in Minerals, Ores of metals
Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Unknown
William Cruickshank
Discovery
Before 5000 BC
In 1787
Abundance
Abundance In Universe
6 * 10-8 %
26
4 * 10-6 %
14
Abundance In Sun
~0.0000001 %
26
~0.000005 %
15
Abundance In Meteorites
0.00 %
38
0.00 %
15
Abundance In Earth's Crust
0.00 %
99+
0.04 %
10
Abundance In Oceans
0.00 %
19
0.00 %
4
Abundance In Humans
Not Available
0.00 %
7
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.
- Strontium metal is used to producing ferrite magnets as well as refining zinc.
- By-product of nuclear reactors called Strontium-90 is a radioactive isotope; it is absorbed by tissues and destroys bone marrow and cancer growth.
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry
Ammunition Industry, Chemical Industry
Medical Uses
Dentistry, Pharmaceutical Industry
NA
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Alloys
Biological Properties
Toxicity
Non Toxic
Non Toxic
Present in Human Body
Yes
Yes
In Blood
0.00 Blood/mg dm-3
29
0.03 Blood/mg dm-3
19
In Bone
0.44 p.p.m.
20
140.00 p.p.m.
7
Physical Properties
Melting Point
961.93 °C
99+
769.00 °C
99+
Boiling Point
2,212.00 °C
99+
1,384.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery White
Luster
Metallic
Metallic
Hardness
Mohs Hardness
2.50
14
1.50
18
Brinell Hardness
251.00 MPa
37
Not Available
Vickers Hardness
229.00 MPa
30
Not Available
Speed of Sound
2,680.00 m/s
34
Not Available
Optical Properties
Reflectivity
97.00 %
1
Not Available
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
Ag
Sr
Isotopes
Known Isotopes
36
3
27
12
Electronegativity
Pauling Electronegativity
1.93
9
0.95
99+
Sanderson Electronegativity
1.83
11
0.72
27
Allred Rochow Electronegativity
1.42
18
0.99
37
Mulliken-Jaffe Electronegativity
1.47
15
1.00
18
Allen Electronegativity
1.87
7
0.96
40
Electropositivity
Pauling Electropositivity
2.07
99+
3.05
7
Ionization Energies
1st Energy Level
731.00 kJ/mol
27
549.50 kJ/mol
99+
2nd Energy Level
2,070.00 kJ/mol
11
1,064.20 kJ/mol
99+
3rd Energy Level
3,361.00 kJ/mol
19
4,138.00 kJ/mol
10
4th Energy Level
Not Available
5,500.00 kJ/mol
13
5th Energy Level
Not Available
6,910.00 kJ/mol
18
6th Energy Level
Not Available
8,760.00 kJ/mol
18
7th Energy level
Not Available
10,230.00 kJ/mol
19
8th Energy Level
Not Available
11,800.00 kJ/mol
19
9th Energy Level
Not Available
15,600.00 kJ/mol
17
10th Energy Level
Not Available
17,100.00 kJ/mol
19
11th Energy Level
Not Available
31,270.00 kJ/mol
6
Electrochemical Equivalent
4.02 g/amp-hr
7
1.64 g/amp-hr
99+
Electron Work Function
4.26 eV
20
2.59 eV
99+
Other Chemical Properties
Chemical Stability, Ionization, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
47
99+
38
99+
Electron Configuration
[Kr] 4d10 5s1
[Kr] 5s2
Crystal Structure
Face Centered Cubic (FCC)
Face Centered Cubic (FCC)
Crystal Lattice
FCC-Crystal-Structure-of-Silver.jpg#100
FCC-Crystal-Structure-of-Strontium.jpg#100
Atom
Number of Protons
47
99+
38
99+
Number of Neutrons
61
99+
50
99+
Number of Electrons
47
99+
38
99+
Radius of an Atom
Atomic Radius
144.00 pm
36
215.00 pm
5
Covalent Radius
145.00 pm
39
195.00 pm
15
Van der Waals Radius
172.00 pm
38
249.00 pm
7
Atomic Weight
107.87 amu
99+
87.62 amu
99+
Atomic Volume
10.30 cm3/mol
99+
33.70 cm3/mol
6
Adjacent Atomic Numbers
Valence Electron Potential
11.40 (-eV)
99+
25.70 (-eV)
99+
Lattice Constant
408.53 pm
20
608.49 pm
6
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
10.49 g/cm3
35
2.64 g/cm3
99+
Density When Liquid (at m.p.)
9.32 g/cm3
21
2.38 g/cm3
99+
Tensile Strength
Not Available
Not Available
Viscosity
Not Available
Not Available
Vapor Pressure
Vapor Pressure at 1000 K
0.00 (Pa)
14
121.00 (Pa)
1
Elasticity properties
Shear Modulus
30.00 GPa
23
6.03 GPa
99+
Bulk Modulus
100.00 GPa
16
Not Available
Young's Modulus
83.00 GPa
23
15.70 GPa
99+
Poisson Ratio
0.37
7
0.28
17
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
10.50
26
2.64
99+
Magnetic Ordering
Diamagnetic
Paramagnetic
Susceptibility
0.00
5
Not Available
Electrical Properties
Electrical Property
Conductor
NA
Resistivity
15.87 nΩ·m
99+
132.00 nΩ·m
24
Electrical Conductivity
0.63 106/cm Ω
1
0.08 106/cm Ω
26
Electron Affinity
125.60 kJ/mol
5
5.03 kJ/mol
38
Thermal Properties
Specific Heat
0.24 J/(kg K)
25
0.30 J/(kg K)
18
Molar Heat Capacity
25.35 J/mol·K
99+
26.40 J/mol·K
28
Thermal Conductivity
429.00 W/m·K
1
35.40 W/m·K
37
Critical Temperature
Not Available
Not Available
Thermal Expansion
18.90 µm/(m·K)
23
22.50 µm/(m·K)
18
Enthalpy
Enthalpy of Vaporization
255.10 kJ/mol
37
150.00 kJ/mol
99+
Enthalpy of Fusion
11.30 kJ/mol
31
9.16 kJ/mol
38
Enthalpy of Atomization
284.50 kJ/mol
37
163.20 kJ/mol
99+
Standard Molar Entropy
42.60 J/mol.K
35
55.00 J/mol.K
26
|
||
|
||
|
