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Berkelium vs Potassium

Berkelium
Potassium
Potassium vs Berkelium


Periodic Table
Symbol
Bk  
K  
Group Number
14  
4
1  
17
Period Number
7  
4  
Block
f block  
s block  
Element Family
Actinide  
Alkali  
CAS Number
7440406  
99+
7440097  
99+
Space Group Name
P63/mmc  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • X-ray Diffraction- different compounds of Berkelium metals are identified using it.
    Commercial uses of Berkelium metal are not yet discovered.
  
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
  
Sources
Bombarding Americium with Alpha Particles.  
Found in Minerals, Mining  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory  
Humphry Davy  
Discovery
In 1949  
In 1807  
Abundance
  
  
Abundance In Universe
0.00 %  
36
0.00 %  
10
Abundance In Sun
0.00 %  
30
0.00 %  
9
Abundance In Meteorites
0.00 %  
99+
0.07 %  
9
Abundance In Earth's Crust
0.00 %  
99+
1.50 %  
6
Abundance In Oceans
-  
0.04 %  
3
Abundance In Humans
0.00 %  
24
0.20 %  
3
Uses
Uses & Benefits
  • This metal is very rare and has no commercial uses.
  
  • 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
-  
Ammunition Industry, Chemical Industry  
Medical Uses
-  
Pharmaceutical Industry  
Other Uses
-  
-  
Biological Properties
  
  
Toxicity
-  
Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
1,620.00 Blood/mg dm-3  
2
In Bone
0.00 p.p.m.  
99+
2,100.00 p.p.m.  
3
Physical
Melting Point
986.00 °C  
99+
63.65 °C  
99+
Boiling Point
2,627.00 °C  
99+
774.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Silvery Gray  
Luster
Metallic  
-  
Hardness
  
  
Mohs Hardness
6.00  
6
0.40  
25
Brinell Hardness
260.00 MPa  
99+
0.36 MPa  
99+
Vickers Hardness
1,070.00 MPa  
16
100.00 MPa  
99+
Speed of Sound
2,560.00 m/s  
99+
2,000.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.33  
99+
Reflectivity
61.00 %  
22
72.00 %  
11
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Bk  
K  
Isotopes
  
  
Known Isotopes
14  
25
20  
19
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
0.82  
99+
Sanderson Electronegativity
1.30  
25
0.45  
99+
Allred Rochow Electronegativity
1.20  
28
0.91  
40
Mulliken-Jaffe Electronegativity
1.30  
33
0.73  
99+
Allen Electronegativity
2.70  
1
0.73  
99+
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
3.18  
3
Ionization Energies
  
  
1st Energy Level
601.00 kJ/mol  
99+
418.80 kJ/mol  
99+
2nd Energy Level
1,186.00 kJ/mol  
99+
3,052.00 kJ/mol  
5
3rd Energy Level
2,152.00 kJ/mol  
99+
4,420.00 kJ/mol  
8
4th Energy Level
3,434.00 kJ/mol  
99+
5,877.00 kJ/mol  
18
5th Energy Level
6,010.00 kJ/mol  
99+
7,975.00 kJ/mol  
14
6th Energy Level
6,010.00 kJ/mol  
99+
9,590.00 kJ/mol  
19
7th Energy level
6,010.00 kJ/mol  
99+
11,343.00 kJ/mol  
17
8th Energy Level
6,010.00 kJ/mol  
99+
14,944.00 kJ/mol  
13
9th Energy Level
6,010.00 kJ/mol  
99+
16,963.70 kJ/mol  
15
10th Energy Level
6,010.00 kJ/mol  
99+
48,610.00 kJ/mol  
3
11th Energy Level
6,010.00 kJ/mol  
99+
54,490.00 kJ/mol  
4
12th Energy Level
60,100.00 kJ/mol  
16
60,730.00 kJ/mol  
15
13th Energy Level
6,010.00 kJ/mol  
99+
68,950.00 kJ/mol  
4
14th Energy Level
6,010.00 kJ/mol  
32
75,900.00 kJ/mol  
5
15th Energy Level
60,100.00 kJ/mol  
99+
83,080.00 kJ/mol  
13
16th Energy Level
60,100.00 kJ/mol  
33
93,400.00 kJ/mol  
7
17th Energy Level
601.00 kJ/mol  
99+
99,710.00 kJ/mol  
8
18th Energy Level
6,010.00 kJ/mol  
99+
4,196.00 kJ/mol  
99+
19th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
20th Energy Level
601.00 kJ/mol  
99+
419.00 kJ/mol  
99+
21st Energy Level
6,010.00 kJ/mol  
18
419.20 kJ/mol  
99+
22nd Energy Level
601.00 kJ/mol  
99+
419.00 kJ/mol  
99+
23rd Energy Level
6,010.00 kJ/mol  
19
419.20 kJ/mol  
99+
24th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
25th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
26th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
27th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
28th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
29th Energy Level
601.00 kJ/mol  
99+
419.20 kJ/mol  
99+
30th Energy Level
601.00 kJ/mol  
99+
419.00 kJ/mol  
99+
Electrochemical Equivalent
3.07 g/amp-hr  
19
1.46 g/amp-hr  
99+
Electron Work Function
4.90 eV  
12
2.30 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Flammability, Ionization, Solubility  
Atomic
Atomic Number
97  
21
19  
99+
Electron Configuration
[Rn] 5f9 7s2  
[Ar] 4s1  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
DHCP-Crystal-Structure-of-Berkelium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
97  
21
19  
99+
Number of Neutrons
150  
12
20  
99+
Number of Electrons
97  
21
19  
99+
Radius of an Atom
  
  
Atomic Radius
170.00 pm  
24
227.00 pm  
4
Covalent Radius
170.00 pm  
27
203.00 pm  
9
Van der Waals Radius
244.00 pm  
14
275.00 pm  
7
Atomic Weight
247.00 amu  
18
39.10 amu  
99+
Atomic Volume
13.39 cm3/mol  
99+
45.46 cm3/mol  
4
Adjacent Atomic Numbers
  
  
Previous Element
Curium
  
Aluminium
  
Next Element
Californium
  
Calcium
  
Valence Electron Potential
45.50 (-eV)  
37
10.40 (-eV)  
99+
Lattice Constant
341.60 pm  
99+
532.80 pm  
13
Lattice Angles
π/2, π/2, 2 π/3  
π/2, π/2, π/2  
Lattice C/A Ratio
1.57  
38
1.69  
10
Mechanical
Density
  
  
Density At Room Temperature
14.78 g/cm3  
23
0.86 g/cm3  
99+
Density When Liquid (at m.p.)
13.25 g/cm3  
29
0.83 g/cm3  
99+
Tensile Strength
70.00 MPa  
31
16.00 MPa  
99+
Viscosity
0.00  
25
0.00  
9
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
16
Vapor Pressure at 2000 K
0.00 (Pa)  
30
0.00 (Pa)  
34
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
1.30 GPa  
99+
Bulk Modulus
13.00 GPa  
99+
3.10 GPa  
99+
Young's Modulus
13.00 GPa  
99+
3.53 GPa  
99+
Poisson Ratio
0.35  
9
0.35  
9
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
14.00  
25
0.86  
99+
Magnetic Ordering
Paramagnetic  
Paramagnetic  
Permeability
0.00 H/m  
13
0.00 H/m  
13
Susceptibility
0.00  
24
0.00  
23
Electrical Properties
  
  
Electrical Property
Conductor  
Conductor  
Resistivity
7.60 nΩ·m  
99+
72.00 nΩ·m  
37
Electrical Conductivity
0.10 106/cm Ω  
25
0.14 106/cm Ω  
16
Electron Affinity
0.00 kJ/mol  
99+
48.40 kJ/mol  
27
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.75 J/(kg K)  
6
Molar Heat Capacity
27.00 J/mol·K  
29
29.60 J/mol·K  
8
Thermal Conductivity
10.00 W/m·K  
99+
102.50 W/m·K  
15
Critical Temperature
1,323.00 K  
99+
2,223.00 K  
14
Thermal Expansion
13.25 µm/(m·K)  
36
83.30 µm/(m·K)  
3
Enthalpy
  
  
Enthalpy of Vaporization
380.00 kJ/mol  
27
77.50 kJ/mol  
99+
Enthalpy of Fusion
13.25 kJ/mol  
31
2.32 kJ/mol  
99+
Enthalpy of Atomization
601.00 kJ/mol  
11
89.50 kJ/mol  
99+
Standard Molar Entropy
52.00 J/mol.K  
37
64.70 J/mol.K  
19
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