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Potassium vs Iron

Potassium
Iron
Iron vs Potassium


Periodic Table
Symbol
K   
Fe   
Group Number
1   
17
8   
10
Period Number
4   
4   
Block
s block   
d block   
Element Family
Alkali   
Transition Metal   
CAS Number
7440097   
99+
7439896   
99+
Space Group Name
Im_ 3m   
Im_ 3m   
Space Group Number
229.00   
1
229.00   
1
Facts
Interesting Facts
  • In the list of most abundant element Potassium is ranked 7th.
  • Potassium can easily be sliced (chopped) down using knife.
  
  • Iron is not always magnetic in nature, its allotrope are ferromagnetic and the B allotrope is nonmagnetic.
  • The blood consists Iron in hemoglobin molecules to transfer Oxygen in the body.
  
Sources
Found in Minerals, Mining   
Earth's crust, Found in Minerals   
History
  
  
Who Discovered
Humphry Davy   
Unknown   
Discovery
In 1807   
Before 5000 BC   
Abundance
  
  
Abundance In Universe
3 * 10-4 %   
9
1.1 * 10-1 %   
1
Abundance In Sun
~0.0004 %   
9
~0.1 %   
1
Abundance In Meteorites
0.07 %   
9
22.00 %   
1
Abundance In Earth's Crust
1.50 %   
6
6.30 %   
2
Abundance In Oceans
0.04 %   
3
0.00 %   
12
Abundance In Humans
0.20 %   
2
0.01 %   
5
Uses
Uses & Benefits
  • 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.
  
  • Iron metal alloy steel is used in the application of civil engineering and manufacturing.
  • Alloys of iron with nickel, vanadium, chromium, tungsten and manganese have very useful properties.
  
Industrial Uses
Ammunition Industry, Chemical Industry   
Aerospace Industry, Automobile Industry, Chemical Industry, Electrical Industry, Electronic Industry   
Medical Uses
Pharmaceutical Industry   
Pharmaceutical Industry, Surgical Instruments Manufacturing   
Other Uses
NA   
Alloys, Sculptures, Statues   
Biological Properties
  
  
Toxicity
Toxic   
Non Toxic   
Present in Human Body
Yes   
Yes   
In Blood
1,620.00 Blood/mg dm-3   
2
447.00 Blood/mg dm-3   
3
In Bone
2,100.00 p.p.m.   
3
380.00 p.p.m.   
5
Physical Properties
Melting Point
63.65 °C   
99+
1,535.00 °C   
25
Boiling Point
774.00 °C   
99+
2,750.00 °C   
37
Appearance
  
  
Physical State
Solid   
Solid   
Color
Silvery Gray   
Gray   
Luster
NA   
Metallic   
Hardness
  
  
Mohs Hardness
0.40   
23
4.00   
10
Brinell Hardness
0.36 MPa   
99+
200.00 MPa   
40
Vickers Hardness
Not Available   
608.00 MPa   
18
Speed of Sound
2,000.00 m/s   
99+
5,120.00 m/s   
8
Optical Properties
  
  
Reflectivity
Not Available   
65.00 %   
12
Allotropes
No   
Yes   
α Allotropes
Not Available   
Ferrite (alpha Iron)   
β Allotropes
Not Available   
beta Iron   
γ Allotropes
Not Available   
gamma Iron   
Chemical Properties
Chemical Formula
K   
Fe   
Isotopes
  
  
Known Isotopes
20   
19
26   
13
Electronegativity
  
  
Pauling Electronegativity
0.82   
99+
1.83   
14
Sanderson Electronegativity
0.45   
31
2.20   
7
Allred Rochow Electronegativity
0.91   
39
1.64   
8
Mulliken-Jaffe Electronegativity
0.73   
23
Not Available   
Allen Electronegativity
0.73   
99+
1.80   
12
Electropositivity
  
  
Pauling Electropositivity
3.18   
3
2.17   
40
Ionization Energies
  
  
1st Energy Level
418.80 kJ/mol   
99+
762.50 kJ/mol   
17
2nd Energy Level
3,052.00 kJ/mol   
5
1,561.90 kJ/mol   
36
3rd Energy Level
4,420.00 kJ/mol   
8
2,957.00 kJ/mol   
29
4th Energy Level
5,877.00 kJ/mol   
9
5,290.00 kJ/mol   
16
5th Energy Level
7,975.00 kJ/mol   
8
7,240.00 kJ/mol   
16
6th Energy Level
9,590.00 kJ/mol   
13
9,560.00 kJ/mol   
14
7th Energy level
11,343.00 kJ/mol   
17
12,060.00 kJ/mol   
15
8th Energy Level
14,944.00 kJ/mol   
13
14,580.00 kJ/mol   
14
9th Energy Level
16,963.70 kJ/mol   
15
22,540.00 kJ/mol   
5
10th Energy Level
48,610.00 kJ/mol   
3
25,290.00 kJ/mol   
8
11th Energy Level
54,490.00 kJ/mol   
4
28,000.00 kJ/mol   
9
12th Energy Level
60,730.00 kJ/mol   
4
31,920.00 kJ/mol   
9
13th Energy Level
68,950.00 kJ/mol   
4
34,830.00 kJ/mol   
9
14th Energy Level
75,900.00 kJ/mol   
5
37,840.00 kJ/mol   
11
15th Energy Level
83,080.00 kJ/mol   
6
44,100.00 kJ/mol   
11
16th Energy Level
93,400.00 kJ/mol   
7
47,206.00 kJ/mol   
13
17th Energy Level
99,710.00 kJ/mol   
8
122,200.00 kJ/mol   
1
18th Energy Level
Not Available   
131,000.00 kJ/mol   
2
19th Energy Level
Not Available   
140,500.00 kJ/mol   
3
20th Energy Level
Not Available   
152,600.00 kJ/mol   
5
21st Energy Level
Not Available   
163,000.00 kJ/mol   
5
22nd Energy Level
Not Available   
173,600.00 kJ/mol   
4
23rd Energy Level
Not Available   
188,100.00 kJ/mol   
4
24th Energy Level
Not Available   
195,200.00 kJ/mol   
1
Electrochemical Equivalent
1.46 g/amp-hr   
99+
0.69 g/amp-hr   
99+
Electron Work Function
2.30 eV   
99+
4.70 eV   
10
Other Chemical Properties
Chemical Stability, Flammability, Ionization, Solubility   
Corrosion, Ionization, Solubility   
Atomic Properties
Atomic Number
19   
99+
26   
99+
Electron Configuration
[Ar] 4s1   
[Ar] 3d6 4s2   
Crystal Structure
Body Centered Cubic (BCC)   
Body Centered Cubic (BCC)   
Crystal Lattice
BCC-Crystal-Structure-.jpg#100   
BCC-Crystal-Structure-.jpg#100   
Atom
  
  
Number of Protons
19   
99+
26   
99+
Number of Neutrons
20   
99+
30   
99+
Number of Electrons
19   
99+
26   
99+
Radius of an Atom
  
  
Atomic Radius
227.00 pm   
3
126.00 pm   
99+
Covalent Radius
203.00 pm   
9
132.00 pm   
99+
Van der Waals Radius
275.00 pm   
5
200.00 pm   
28
Atomic Weight
39.10 amu   
99+
55.85 amu   
99+
Atomic Volume
45.46 cm3/mol   
3
7.10 cm3/mol   
99+
Adjacent Atomic Numbers
  
  
Previous Element
Aluminium
  
Manganese
  
Next Element
Calcium
  
Cobalt
  
Valence Electron Potential
10.40 (-eV)   
99+
67.00 (-eV)   
20
Lattice Constant
532.80 pm   
12
286.65 pm   
99+
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
0.86 g/cm3   
99+
7.87 g/cm3   
99+
Density When Liquid (at m.p.)
0.83 g/cm3   
99+
6.98 g/cm3   
35
Tensile Strength
Not Available   
11,000.00 MPa   
1
Viscosity
Not Available   
Not Available   
Vapor Pressure
  
  
Vapor Pressure at 1000 K
Not Available   
0.00 (Pa)   
28
Vapor Pressure at 2000 K
Not Available   
36.80 (Pa)   
5
Elasticity properties
  
  
Shear Modulus
1.30 GPa   
99+
82.00 GPa   
11
Bulk Modulus
3.10 GPa   
99+
170.00 GPa   
10
Young's Modulus
3.53 GPa   
99+
211.00 GPa   
9
Poisson Ratio
Not Available   
0.29   
15
Other Mechanical Properties
NA   
Ductile, Malleable, Weldable   
Magnetic Properties
Magnetic Characteristics
  
  
Specific Gravity
0.86   
99+
7.20   
99+
Magnetic Ordering
Paramagnetic   
Ferromagnetic   
Permeability
Not Available   
6.3 * 10-3 H/m   
1
Susceptibility
Not Available   
2,00,000.00   
1
Electrical Properties
  
  
Electrical Property
Conductor   
Conductor   
Resistivity
72.00 nΩ·m   
37
96.10 nΩ·m   
32
Electrical Conductivity
0.14 106/cm Ω   
14
0.10 106/cm Ω   
20
Electron Affinity
48.40 kJ/mol   
22
15.70 kJ/mol   
34
Thermal Properties
Specific Heat
0.75 J/(kg K)   
6
0.44 J/(kg K)   
13
Molar Heat Capacity
29.60 J/mol·K   
6
25.10 J/mol·K   
99+
Thermal Conductivity
102.50 W/m·K   
15
80.40 W/m·K   
22
Critical Temperature
2,223.00 K   
3
Not Available   
Thermal Expansion
83.30 µm/(m·K)   
3
11.80 µm/(m·K)   
33
Enthalpy
  
  
Enthalpy of Vaporization
77.50 kJ/mol   
99+
351.00 kJ/mol   
23
Enthalpy of Fusion
2.32 kJ/mol   
99+
14.90 kJ/mol   
22
Enthalpy of Atomization
89.50 kJ/mol   
99+
414.20 kJ/mol   
19
Standard Molar Entropy
64.70 J/mol.K   
18
27.30 J/mol.K   
99+
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