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Terbium Potassium Comparison

Terbium
Potassium
Potassium Terbium comparison


Periodic Table
Symbol
Tb   
K   
Group Number
Not Available   
1   
17
Period Number
6   
4   
Block
f block   
s block   
Element Family
Lanthanide   
Alkali   
CAS Number
7440279   
99+
7440097   
99+
Space Group Name
P63/mmc   
Im_ 3m   
Space Group Number
194.00   
5
229.00   
1
Facts
Interesting Facts
  • At times Terbium metal acts same as Calcium.
  • Terbium metal closely similar to Lanthanum metal.
  
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
  
Sources
Found in Minerals, Found with Other Rare Earth Metals, Mining, Ores of Minerals   
Found in Minerals, Mining   
History
  
  
Who Discovered
Carl Gustaf Mosander   
Humphry Davy   
Discovery
In 1842   
In 1807   
Abundance
  
  
Abundance In Universe
5 * 10-8 %   
27
3 * 10-4 %   
9
Abundance In Sun
~0.00000001 %   
29
~0.0004 %   
9
Abundance In Meteorites
0.00 %   
99+
0.07 %   
9
Abundance In Earth's Crust
0.00 %   
40
1.50 %   
6
Abundance In Oceans
0.00 %   
99+
0.04 %   
3
Abundance In Humans
Not Available   
0.20 %   
2
Uses
Uses & Benefits
  • Terbium salts are used in optical devices like laser devices.
  • Terbium’s alloy lengthens and shortens the magnetic field and this effect forms loudspeaker.
  
  • Potassium’s compounds are in high demand for their application in Fertilizer manufacturing.
  • Potassium carbonate is used in glass manufacturing and Potassium carbonate in manufacturing detergent and body wash.
  
Industrial Uses
Electronic Industry   
Ammunition Industry, Chemical Industry   
Medical Uses
NA   
Pharmaceutical Industry   
Other Uses
Alloys   
NA   
Biological Properties
  
  
Toxicity
Low Toxic   
Toxic   
Present in Human Body
No   
Yes   
In Blood
Not Available   
1,620.00 Blood/mg dm-3   
2
In Bone
Not Available   
2,100.00 p.p.m.   
3
Physical Properties
Melting Point
1,356.00 °C   
33
63.65 °C   
99+
Boiling Point
3,123.00 °C   
29
774.00 °C   
99+
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery White   
Silvery Gray   
Luster
Metallic   
NA   
Hardness
  
  
Mohs Hardness
Not Available   
0.40   
23
Brinell Hardness
677.00 MPa   
17
0.36 MPa   
99+
Vickers Hardness
863.00 MPa   
13
Not Available   
Speed of Sound
2,620.00 m/s   
35
2,000.00 m/s   
99+
Optical Properties
  
  
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
Tb   
K   
Isotopes
  
  
Known Isotopes
26   
13
20   
19
Electronegativity
  
  
Pauling Electronegativity
Not Available   
0.82   
99+
Sanderson Electronegativity
Not Available   
0.45   
31
Allred Rochow Electronegativity
1.10   
30
0.91   
39
Mulliken-Jaffe Electronegativity
Not Available   
0.73   
23
Allen Electronegativity
Not Available   
0.73   
99+
Electropositivity
  
  
Pauling Electropositivity
Not Available   
3.18   
3
Ionization Energies
  
  
1st Energy Level
603.40 kJ/mol   
99+
418.80 kJ/mol   
99+
2nd Energy Level
1,174.80 kJ/mol   
99+
3,052.00 kJ/mol   
5
3rd Energy Level
2,417.00 kJ/mol   
99+
4,420.00 kJ/mol   
8
4th Energy Level
4,203.00 kJ/mol   
31
5,877.00 kJ/mol   
9
5th Energy Level
Not Available   
7,975.00 kJ/mol   
8
6th Energy Level
Not Available   
9,590.00 kJ/mol   
13
7th Energy level
Not Available   
11,343.00 kJ/mol   
17
8th Energy Level
Not Available   
14,944.00 kJ/mol   
13
9th Energy Level
Not Available   
16,963.70 kJ/mol   
15
10th Energy Level
Not Available   
48,610.00 kJ/mol   
3
11th Energy Level
Not Available   
54,490.00 kJ/mol   
4
12th Energy Level
Not Available   
60,730.00 kJ/mol   
4
13th Energy Level
Not Available   
68,950.00 kJ/mol   
4
14th Energy Level
Not Available   
75,900.00 kJ/mol   
5
15th Energy Level
Not Available   
83,080.00 kJ/mol   
6
16th Energy Level
Not Available   
93,400.00 kJ/mol   
7
17th Energy Level
Not Available   
99,710.00 kJ/mol   
8
Electrochemical Equivalent
1.98 g/amp-hr   
31
1.46 g/amp-hr   
99+
Electron Work Function
3.00 eV   
36
2.30 eV   
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Solubility   
Chemical Stability, Flammability, Ionization, Solubility   
Atomic Properties
Atomic Number
65   
99+
19   
99+
Electron Configuration
[Xe] 4f9 6s2   
[Ar] 4s1   
Crystal Structure
Hexagonal Close Packed (HCP)   
Body Centered Cubic (BCC)   
Crystal Lattice
HCP-Crystal-Structure-of-Terbium.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
65   
99+
19   
99+
Number of Neutrons
94   
36
20   
99+
Number of Electrons
65   
99+
19   
99+
Radius of an Atom
  
  
Atomic Radius
177.00 pm   
17
227.00 pm   
3
Covalent Radius
194.00 pm   
16
203.00 pm   
9
Van der Waals Radius
221.00 pm   
22
275.00 pm   
5
Atomic Weight
158.93 amu   
99+
39.10 amu   
99+
Atomic Volume
19.20 cm3/mol   
22
45.46 cm3/mol   
3
Adjacent Atomic Numbers
  
  
Previous Element
Gadolinium
  
Aluminium
  
Next Element
Dysprosium
  
Calcium
  
Valence Electron Potential
46.80 (-eV)   
33
10.40 (-eV)   
99+
Lattice Constant
360.10 pm   
36
532.80 pm   
12
Lattice Angles
π/2, π/2, 2 π/3   
π/2, π/2, π/2   
Lattice C/A Ratio
1.58   
13
Not Available   
Mechanical Properties
Density
  
  
Density At Room Temperature
8.23 g/cm3   
99+
0.86 g/cm3   
99+
Density When Liquid (at m.p.)
7.65 g/cm3   
30
0.83 g/cm3   
99+
Tensile Strength
60.00 MPa   
17
Not Available   
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)   
29
Not Available   
Vapor Pressure at 2000 K
12.50 (Pa)   
8
Not Available   
Elasticity properties
  
  
Shear Modulus
22.10 GPa   
32
1.30 GPa   
99+
Bulk Modulus
38.70 GPa   
33
3.10 GPa   
99+
Young's Modulus
55.70 GPa   
34
3.53 GPa   
99+
Poisson Ratio
0.26   
21
Not Available   
Other Mechanical Properties
Ductile, Malleable   
NA   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
8.23   
39
0.86   
99+
Magnetic Ordering
Paramagnetic   
Paramagnetic   
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
1.15 nΩ·m   
99+
72.00 nΩ·m   
37
Electrical Conductivity
0.01 106/cm Ω   
99+
0.14 106/cm Ω   
14
Electron Affinity
50.00 kJ/mol   
21
48.40 kJ/mol   
22
Thermal Properties
Specific Heat
0.18 J/(kg K)   
33
0.75 J/(kg K)   
6
Molar Heat Capacity
28.91 J/mol·K   
9
29.60 J/mol·K   
6
Thermal Conductivity
11.10 W/m·K   
99+
102.50 W/m·K   
15
Critical Temperature
Not Available   
2,223.00 K   
3
Thermal Expansion
10.30 µm/(m·K)   
38
83.30 µm/(m·K)   
3
Enthalpy
  
  
Enthalpy of Vaporization
330.90 kJ/mol   
26
77.50 kJ/mol   
99+
Enthalpy of Fusion
10.80 kJ/mol   
34
2.32 kJ/mol   
99+
Enthalpy of Atomization
314.00 kJ/mol   
33
89.50 kJ/mol   
99+
Standard Molar Entropy
73.20 J/mol.K   
10
64.70 J/mol.K   
18
Summary >>
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