Silver Barium Comparison
Periodic Table
Symbol
Ag
Ba
Group Number
11
7
2
16
Period Number
5
6
Block
d block
s block
Element Family
Transition Metal
Alkaline Earth
CAS Number
7440224
99+
7440393
99+
Space Group Name
Fm_ 3m
Im_ 3m
Space Group Number
225.00
2
229.00
1
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.
- Barium oxidizes very easily in the air.
- All toxic compounds of Barium can easily dissolve in water.
- Barium carbonate is used to produce a Rat poison and its other compound Barium nitrate is used in fireworks to produce green color.
Sources
Earth's crust, Found in Minerals, Ores of metals
Earth's crust, Found in Minerals, Mining, Ores of Minerals
History
Who Discovered
Unknown
Carl Wilhelm Scheele
Discovery
Before 5000 BC
In 1772
Abundance
Abundance In Universe
6 * 10-8 %
26
1 * 10-6 %
16
Abundance In Sun
~0.0000001 %
26
~0.000001 %
18
Abundance In Meteorites
0.00 %
38
0.00 %
20
Abundance In Earth's Crust
0.00 %
99+
0.03 %
11
Abundance In Oceans
0.00 %
19
0.00 %
8
Abundance In Humans
Not Available
0.00 %
12
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 sued in chemical paint manufacturing and glass manufacturing.
- Compounds of this metal are toxic; but still the barium sulfate is insoluble and given to patients suffering from digestive disorder.
Industrial Uses
Chemical Industry, Clothing Industry, Electrical Industry
Ammunition Industry, Automobile Industry, Electrical Industry, Electronic Industry
Medical Uses
Dentistry, Pharmaceutical Industry
NA
Other Uses
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues
Alloys
Biological Properties
Toxicity
Non Toxic
Low Toxic
Present in Human Body
Yes
Yes
In Blood
0.00 Blood/mg dm-3
29
0.07 Blood/mg dm-3
15
In Bone
0.44 p.p.m.
20
70.00 p.p.m.
9
Physical Properties
Melting Point
961.93 °C
99+
725.00 °C
99+
Boiling Point
2,212.00 °C
99+
1,140.00 °C
99+
Appearance
Physical State
Solid
Solid
Color
Silvery White
Silvery Gray
Luster
Metallic
NA
Hardness
Mohs Hardness
2.50
14
1.25
19
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
1,620.00 m/s
99+
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
Ba
Isotopes
Known Isotopes
36
3
37
2
Electronegativity
Pauling Electronegativity
1.93
9
0.89
99+
Sanderson Electronegativity
1.83
11
0.68
28
Allred Rochow Electronegativity
1.42
18
0.97
38
Mulliken-Jaffe Electronegativity
1.47
15
0.88
22
Allen Electronegativity
1.87
7
0.88
99+
Electropositivity
Pauling Electropositivity
2.07
99+
3.11
4
Ionization Energies
1st Energy Level
731.00 kJ/mol
27
502.90 kJ/mol
99+
2nd Energy Level
2,070.00 kJ/mol
11
965.20 kJ/mol
99+
3rd Energy Level
3,361.00 kJ/mol
19
3,600.00 kJ/mol
14
Electrochemical Equivalent
4.02 g/amp-hr
7
2.56 g/amp-hr
20
Electron Work Function
4.26 eV
20
2.70 eV
99+
Other Chemical Properties
Chemical Stability, Ionization, Solubility
Ionization, Radioactive Isotopes, Radioactivity, Solubility
Atomic Properties
Atomic Number
47
99+
56
99+
Electron Configuration
[Kr] 4d10 5s1
[Xe] 6s2
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+
56
99+
Number of Neutrons
61
99+
81
99+
Number of Electrons
47
99+
56
99+
Radius of an Atom
Atomic Radius
144.00 pm
36
222.00 pm
4
Covalent Radius
145.00 pm
39
215.00 pm
5
Van der Waals Radius
172.00 pm
38
268.00 pm
6
Atomic Weight
107.87 amu
99+
137.33 amu
99+
Atomic Volume
10.30 cm3/mol
99+
39.24 cm3/mol
5
Adjacent Atomic Numbers
Valence Electron Potential
11.40 (-eV)
99+
21.30 (-eV)
99+
Lattice Constant
408.53 pm
20
502.80 pm
15
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
3.51 g/cm3
99+
Density When Liquid (at m.p.)
9.32 g/cm3
21
3.34 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
7.11 (Pa)
6
Elasticity properties
Shear Modulus
30.00 GPa
23
4.90 GPa
99+
Bulk Modulus
100.00 GPa
16
9.60 GPa
99+
Young's Modulus
83.00 GPa
23
13.00 GPa
99+
Poisson Ratio
0.37
7
Not Available
Other Mechanical Properties
Ductile, Malleable
NA
Magnetic Properties
Magnetic Characteristics
Specific Gravity
10.50
26
3.62
99+
Magnetic Ordering
Diamagnetic
Paramagnetic
Susceptibility
0.00
5
Not Available
Electrical Properties
Electrical Property
Conductor
Superconductor
Resistivity
15.87 nΩ·m
99+
332.00 nΩ·m
13
Electrical Conductivity
0.63 106/cm Ω
1
0.03 106/cm Ω
40
Electron Affinity
125.60 kJ/mol
5
13.95 kJ/mol
36
Thermal Properties
Specific Heat
0.24 J/(kg K)
25
0.20 J/(kg K)
30
Molar Heat Capacity
25.35 J/mol·K
99+
28.07 J/mol·K
12
Thermal Conductivity
429.00 W/m·K
1
18.40 W/m·K
99+
Critical Temperature
Not Available
Not Available
Thermal Expansion
18.90 µm/(m·K)
23
20.60 µm/(m·K)
22
Enthalpy
Enthalpy of Vaporization
255.10 kJ/mol
37
140.00 kJ/mol
99+
Enthalpy of Fusion
11.30 kJ/mol
31
7.66 kJ/mol
99+
Enthalpy of Atomization
284.50 kJ/mol
37
175.70 kJ/mol
99+
Standard Molar Entropy
42.60 J/mol.K
35
62.50 J/mol.K
20
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