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Chromium
Chromium

Potassium
Potassium



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Chromium
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Potassium

Chromium Potassium Comparison

1 Periodic Table
1.1 Symbol
Cr
K
1.2 Group Number
61
Gadolinium Metal
0 17
1.3 Period Number
44
Lithium Metal
2 7
1.4 Block
d block
s block
1.5 Element Family
Transition Metal
Alkali
1.6 CAS Number
74404737440097
Aluminium Metal
7429905 54386242
1.7 Space Group Name
Im_ 3m
Im_ 3m
1.8 Space Group Number
229.00229.00
Plutonium Metal
11 229
2 Facts
2.1 Interesting Facts
  • Chromium is highly reactive, hence it is not found free in nature.
  • Ores of Chromites mineral are the major source of Chromium metal.
  • Almost 90% leather tanning is done with the help of chromium.
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
2.2 Sources
Found in Minerals, Mining, Ores of metals, Ores of Minerals
Found in Minerals, Mining
2.3 History
2.3.1 Who Discovered
Louis Nicolas Vauquelin
Humphry Davy
2.3.2 Discovery
In Between 1797 - 1798
In 1807
2.4 Abundance
2.4.1 Abundance In Universe
1.5 * 10-3 %3 * 10-4 %
Thallium Metal
5E-09 0.11
2.4.2 Abundance In Sun
~0.002 %~0.0004 %
Beryllium Metal
1E-08 0.1
2.4.3 Abundance In Meteorites
0.30 %0.07 %
Gold Metal
1.7E-07 22
2.4.4 Abundance In Earth's Crust
0.01 %1.50 %
Radium Metal
9.9E-12 8.1
2.4.5 Abundance In Oceans
0.00 %0.04 %
Protactinium Metal
2E-23 1.1
2.4.6 Abundance In Humans
0.00 %0.20 %
Radium Metal
1E-13 1.4
3 Uses
3.1 Uses & Benefits
  • It is used to harden the steel and produces a stainless steel and other various alloys.
  • It is also used to give proper finish to polished mirrors. Its chromium plates are used in bathroom fittings.
  • 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.
3.1.1 Industrial Uses
Automobile Industry, Chemical Industry
Ammunition Industry, Chemical Industry
3.1.2 Medical Uses
NA
Pharmaceutical Industry
3.1.3 Other Uses
Alloys
NA
3.2 Biological Properties
3.2.1 Toxicity
Highly Toxic
Toxic
3.2.2 Present in Human Body
3.2.3 In Blood
0.11 Blood/mg dm-31,620.00 Blood/mg dm-3
Plutonium Metal
0 1970
3.2.4 In Bone
0.33 p.p.m.2,100.00 p.p.m.
Plutonium Metal
0 170000
4 Physical
4.1 Melting Point
1,857.00 °C63.65 °C
Francium Metal
27 3410
4.2 Boiling Point
2,672.00 °C774.00 °C
Flerovium Metal
147 5660
4.3 Appearance
4.3.1 Physical State
Solid
Solid
4.3.2 Color
Silver
Silvery Gray
4.3.3 Luster
Metallic
NA
4.4 Hardness
4.4.1 Mohs Hardness
8.500.40
Cesium Metal
0.2 8.5
4.4.2 Brinell Hardness
687.00 MPa0.36 MPa
Cesium Metal
0.14 3490
4.4.3 Vickers Hardness
1,060.00 MPaNA
Palladium Metal
121 3430
4.5 Speed of Sound
5,940.00 m/s2,000.00 m/s
Thallium Metal
818 16200
4.6 Optical Properties
4.6.1 Refractive Index
NANA
Mercury Metal
1.000933 1.7229
4.6.2 Reflectivity
NANA
Molybdenum Metal
58 97
4.7 Allotropes
4.7.1 α Allotropes
Not Available
Not Available
4.7.2 β Allotropes
Not Available
Not Available
4.7.3 γ Allotropes
Not Available
Not Available
5 Chemical
5.1 Chemical Formula
Cr
K
5.2 Isotopes
5.2.1 Known Isotopes
2120
Tennessine Metal
0 38
5.3 Electronegativity
5.3.1 Pauling Electronegativity
1.660.82
Francium Metal
0.7 2.54
5.3.2 Sanderson Electronegativity
1.660.45
Cesium Metal
0.22 2.56
5.3.3 Allred Rochow Electronegativity
1.560.91
Cesium Metal
0.86 1.82
5.3.4 Mulliken-Jaffe Electronegativity
NA0.73
Cesium Metal
0.62 2.48
5.3.5 Allen Electronegativity
1.650.73
Cesium Metal
0.659 2.7
5.4 Electropositivity
5.4.1 Pauling Electropositivity
2.343.18
Gold Metal
1.46 3.3
5.5 Ionization Energies
5.5.1 1st Energy Level
26,130.00 kJ/mol418.80 kJ/mol
Cesium Metal
375.7 26130
5.5.2 2nd Energy Level
28,750.00 kJ/mol3,052.00 kJ/mol
Ruthenium Metal
710.2162 28750
5.5.3 3rd Energy Level
34,230.00 kJ/mol4,420.00 kJ/mol
Osmium Metal
1600 34230
5.5.4 4th Energy Level
37,066.00 kJ/mol5,877.00 kJ/mol
Thorium Metal
2780 37066
5.5.5 5th Energy Level
97,510.00 kJ/mol7,975.00 kJ/mol
Dubnium Metal
4305.2 97510
5.5.6 6th Energy Level
105,800.00 kJ/mol9,590.00 kJ/mol
Seaborgium Metal
5715.8 105800
5.5.7 7th Energy level
114,300.00 kJ/mol11,343.00 kJ/mol
Bohrium Metal
7226.8 114300
5.5.8 8th Energy Level
125,300.00 kJ/mol14,944.00 kJ/mol
Hassium Metal
8857.4 125300
5.5.9 9th Energy Level
134,700.00 kJ/mol16,963.70 kJ/mol
Yttrium Metal
14110 134700
5.5.10 10th Energy Level
144,300.00 kJ/mol48,610.00 kJ/mol
Strontium Metal
17100 144300
5.5.11 11th Energy Level
26,130.00 kJ/mol54,490.00 kJ/mol
Yttrium Metal
19900 169988
5.5.12 12th Energy Level
28,750.00 kJ/mol60,730.00 kJ/mol
Molybdenum Metal
22219 189368
5.5.13 13th Energy Level
34,230.00 kJ/mol68,950.00 kJ/mol
Molybdenum Metal
26930 76015
5.5.14 14th Energy Level
37,066.00 kJ/mol75,900.00 kJ/mol
Molybdenum Metal
29196 86450
5.5.15 15th Energy Level
97,510.00 kJ/mol83,080.00 kJ/mol
Manganese Metal
41987 97510
5.5.16 16th Energy Level
105,800.00 kJ/mol93,400.00 kJ/mol
Iron Metal
47206 109480
5.5.17 17th Energy Level
114,300.00 kJ/mol99,710.00 kJ/mol
Cobalt Metal
52737 122200
5.5.18 18th Energy Level
125,300.00 kJ/molNA
Nickel Metal
58570 134810
5.5.19 19th Energy Level
134,700.00 kJ/molNA
Copper Metal
64702 148700
5.5.20 20th Energy Level
144,300.00 kJ/molNA
Molybdenum Metal
80400 171200
5.5.21 21st Energy Level
157,700.00 kJ/molNA
Molybdenum Metal
87000 179100
5.5.22 22nd Energy Level
166,090.00 kJ/molNA
Molybdenum Metal
93400 184900
5.5.23 23rd Energy Level
NANA
Molybdenum Metal
98420 198800
5.5.24 24th Energy Level
NANA
Molybdenum Metal
104400 195200
5.5.25 25th Energy Level
NANA
Molybdenum Metal
121900 121900
5.5.26 26th Energy Level
NANA
Molybdenum Metal
127700 127700
5.5.27 27th Energy Level
NANA
Molybdenum Metal
133800 133800
5.5.28 28th Energy Level
NANA
Molybdenum Metal
139800 139800
5.5.29 29th Energy Level
NANA
Molybdenum Metal
148100 148100
5.5.30 30th Energy Level
NANA
Molybdenum Metal
154500 154500
5.6 Electrochemical Equivalent
0.32 g/amp-hr1.46 g/amp-hr
Beryllium Metal
0.16812 8.3209
5.7 Electron Work Function
4.50 eV2.30 eV
Cesium Metal
2.14 5.65
5.8 Other Chemical Properties
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility
Chemical Stability, Flammability, Ionization, Solubility
6 Atomic
6.1 Atomic Number
2419
Lithium Metal
3 117
6.2 Electron Configuration
[Ar] 3d5 4s1
[Ar] 4s1
6.3 Crystal Structure
Body Centered Cubic (BCC)
Body Centered Cubic (BCC)
6.3.1 Crystal Lattice
6.4 Atom
6.4.1 Number of Protons
2419
Lithium Metal
3 117
6.4.2 Number of Neutrons
2820
Lithium Metal
4 184
6.4.3 Number of Electrons
2419
Lithium Metal
3 117
6.5 Radius of an Atom
6.5.1 Atomic Radius
128.00 pm227.00 pm
Beryllium Metal
112 265
6.5.2 Covalent Radius
139.00 pm203.00 pm
Beryllium Metal
96 260
6.5.3 Van der Waals Radius
200.00 pm275.00 pm
Zinc Metal
139 348
6.6 Atomic Weight
52.00 amu39.10 amu
Lithium Metal
6.94 294
6.7 Atomic Volume
7.23 cm3/mol45.46 cm3/mol
Manganese Metal
1.39 71.07
6.8 Adjacent Atomic Numbers
6.8.1 Previous Element
6.8.2 Next Element
6.9 Valence Electron Potential
170.00 (-eV)10.40 (-eV)
Francium Metal
8 392.42
6.10 Lattice Constant
291.00 pm532.80 pm
Beryllium Metal
228.58 891.25
6.11 Lattice Angles
π/2, π/2, π/2
π/2, π/2, π/2
6.12 Lattice C/A Ratio
NANA
Beryllium Metal
1.567 1.886
7 Mechanical
7.1 Density
7.1.1 Density At Room Temperature
7.19 g/cm30.86 g/cm3
Lithium Metal
0.534 40.7
7.1.2 Density When Liquid (at m.p.)
6.30 g/cm30.83 g/cm3
Lithium Metal
0.512 20
7.2 Tensile Strength
689.00 MPaNA
Indium Metal
2.5 11000
7.3 Viscosity
NANA
Mercury Metal
0.001526 0.001526
7.4 Vapor Pressure
7.4.1 Vapor Pressure at 1000 K
0.00 (Pa)NA
Cerium Metal
2.47E-11 121
7.4.2 Vapor Pressure at 2000 K
774.00 (Pa)NA
Tungsten Metal
2.62E-10 774
7.5 Elasticity properties
7.5.1 Shear Modulus
115.00 GPa1.30 GPa
Palladium
1.3 222
7.5.2 Bulk Modulus
160.00 GPa3.10 GPa
Cesium Metal
1.6 462
7.5.3 Young's Modulus
279.00 GPa3.53 GPa
Cesium Metal
1.7 528
7.6 Poisson Ratio
0.21NA
Beryllium Metal
0.032 0.47
7.7 Other Mechanical Properties
NA
NA
8 Magnetic
8.1 Magnetic Characteristics
8.1.1 Specific Gravity
7.190.86
Lithium Metal
0.53 4500
8.1.2 Magnetic Ordering
Antiferromagnetic
Paramagnetic
8.1.3 Permeability
NANA
Bismuth Metal
1.25643E-06 0.0063
8.1.4 Susceptibility
NANA
Bismuth Metal
-0.000166 200000
8.2 Electrical Properties
8.2.1 Electrical Property
NA
Conductor
8.2.2 Resistivity
125.00 nΩ·m72.00 nΩ·m
Thallium Metal
0.18 961
8.2.3 Electrical Conductivity
0.08 106/cm Ω0.14 106/cm Ω
Plutonium Metal
0.00666 0.63
8.2.4 Electron Affinity
64.30 kJ/mol48.40 kJ/mol
Mercury Metal
0 222.8
9 Thermal
9.1 Specific Heat
0.45 J/(kg K)0.75 J/(kg K)
Americium Metal
0.11 3.6
9.2 Molar Heat Capacity
23.35 J/mol·K29.60 J/mol·K
Beryllium Metal
16.443 62.7
9.3 Thermal Conductivity
93.90 W/m·K102.50 W/m·K
Neptunium Metal
6.3 429
9.4 Critical Temperature
NA2,223.00 K
Ytterbium Metal
26.3 3223
9.5 Thermal Expansion
4.90 µm/(m·K)83.30 µm/(m·K)
Tungsten Metal
4.5 97
9.6 Enthalpy
9.6.1 Enthalpy of Vaporization
348.80 kJ/mol77.50 kJ/mol
Zinc Metal
7.32 799.1
9.6.2 Enthalpy of Fusion
15.31 kJ/mol2.32 kJ/mol
Cesium Metal
2.1 35.23
9.6.3 Enthalpy of Atomization
397.50 kJ/mol89.50 kJ/mol
Mercury Metal
61.5 837
9.7 Standard Molar Entropy
23.80 J/mol.K64.70 J/mol.K
Beryllium Metal
9.5 198.1