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