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Rutherfordium vs Chromium

Rutherfordium
Chromium
Chromium vs Rutherfordium


Periodic Table
Symbol
Rf  
Cr  
Group Number
4  
14
6  
12
Period Number
7  
4  
Block
d block  
d block  
Element Family
Transition Metal  
Transition Metal  
CAS Number
53850365  
13
7440473  
39
Space Group Name
-  
Im_ 3m  
Space Group Number
166.00  
9
229.00  
2
Facts
Interesting Facts
  • Rutherfordium does not occur in nature as it is a synthetic element.
  • Till date Rutherfordium metal has 15 radioisotopes created synthetically.
  
  • 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.
  
Sources
Bombarding Plutonium with Accelerated 113 to 115 MeV Neon Ions, Synthetically Produced  
Found in Minerals, Mining, Ores of metals, Ores of Minerals  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Louis Nicolas Vauquelin  
Discovery
In 1964  
In Between 1797 - 1798  
Abundance
  
  
Abundance In Universe
0.00 %  
40
0.00 %  
8
Abundance In Sun
-  
0.00 %  
7
Abundance In Meteorites
-  
0.30 %  
7
Abundance In Earth's Crust
-  
0.01 %  
13
Abundance In Oceans
-  
0.00 %  
16
Abundance In Humans
-  
0.00 %  
19
Uses
Uses & Benefits
  • Currently known uses of Rutherfordium metal are limited to research purpose only.
  
  • 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.
  
Industrial Uses
-  
Automobile Industry, Chemical Industry  
Medical Uses
-  
-  
Other Uses
Alloys, Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Highly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.11 Blood/mg dm-3  
12
In Bone
0.00 p.p.m.  
99+
0.33 p.p.m.  
25
Physical
Melting Point
2,100.00 °C  
11
1,857.00 °C  
14
Boiling Point
5,500.00 °C  
3
2,672.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silver  
Luster
Unknown Luster  
Metallic  
Hardness
  
  
Mohs Hardness
-  
8.50  
1
Brinell Hardness
1,300.00 MPa  
9
687.00 MPa  
18
Vickers Hardness
550.00 MPa  
31
1,060.00 MPa  
17
Speed of Sound
6,100.00 m/s  
5
5,940.00 m/s  
8
Optical Properties
  
  
Refractive Index
1.30  
99+
2.97  
2
Reflectivity
65.00 %  
18
70.00 %  
13
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Rf  
Cr  
Isotopes
  
  
Known Isotopes
13  
26
21  
18
Electronegativity
  
  
Pauling Electronegativity
0.00  
99+
1.66  
19
Sanderson Electronegativity
1.90  
13
1.66  
17
Allred Rochow Electronegativity
1.30  
25
1.56  
11
Mulliken-Jaffe Electronegativity
1.30  
33
1.66  
19
Allen Electronegativity
0.90  
99+
1.65  
22
Electropositivity
  
  
Pauling Electropositivity
2.20  
39
2.34  
36
Ionization Energies
  
  
1st Energy Level
579.90 kJ/mol  
99+
26,130.00 kJ/mol  
1
2nd Energy Level
1,389.40 kJ/mol  
99+
28,750.00 kJ/mol  
1
3rd Energy Level
2,296.40 kJ/mol  
99+
34,230.00 kJ/mol  
1
4th Energy Level
3,077.90 kJ/mol  
99+
37,066.00 kJ/mol  
1
5th Energy Level
5,790.00 kJ/mol  
99+
97,510.00 kJ/mol  
1
6th Energy Level
11,600.00 kJ/mol  
7
105,800.00 kJ/mol  
1
7th Energy level
5,800.00 kJ/mol  
99+
114,300.00 kJ/mol  
1
8th Energy Level
5,800.00 kJ/mol  
99+
125,300.00 kJ/mol  
1
9th Energy Level
5,800.00 kJ/mol  
99+
134,700.00 kJ/mol  
1
10th Energy Level
5,800.00 kJ/mol  
99+
144,300.00 kJ/mol  
1
11th Energy Level
5,800.00 kJ/mol  
99+
26,130.00 kJ/mol  
12
12th Energy Level
5,800.00 kJ/mol  
99+
28,750.00 kJ/mol  
36
13th Energy Level
5,800.00 kJ/mol  
99+
34,230.00 kJ/mol  
10
14th Energy Level
5,800.00 kJ/mol  
99+
37,066.00 kJ/mol  
12
15th Energy Level
58,000.00 kJ/mol  
99+
97,510.00 kJ/mol  
2
16th Energy Level
58,000.00 kJ/mol  
99+
105,800.00 kJ/mol  
2
17th Energy Level
579.90 kJ/mol  
99+
114,300.00 kJ/mol  
3
18th Energy Level
3,300.00 kJ/mol  
99+
125,300.00 kJ/mol  
4
19th Energy Level
579.90 kJ/mol  
99+
134,700.00 kJ/mol  
5
20th Energy Level
580.00 kJ/mol  
99+
144,300.00 kJ/mol  
7
21st Energy Level
5,800.00 kJ/mol  
21
157,700.00 kJ/mol  
7
22nd Energy Level
579.00 kJ/mol  
99+
166,090.00 kJ/mol  
6
23rd Energy Level
5,800.00 kJ/mol  
21
653.80 kJ/mol  
99+
24th Energy Level
579.10 kJ/mol  
99+
653.80 kJ/mol  
32
25th Energy Level
0.00 kJ/mol  
99+
653.80 kJ/mol  
34
26th Energy Level
580.00 kJ/mol  
99+
653.80 kJ/mol  
33
27th Energy Level
580.00 kJ/mol  
99+
652.90 kJ/mol  
34
28th Energy Level
840.00 kJ/mol  
14
653.80 kJ/mol  
39
29th Energy Level
580.60 kJ/mol  
99+
653.80 kJ/mol  
40
30th Energy Level
0.00 kJ/mol  
99+
653.80 kJ/mol  
36
Electrochemical Equivalent
3.00 g/amp-hr  
21
0.32 g/amp-hr  
99+
Electron Work Function
6.00 eV  
1
4.50 eV  
19
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Anti Corrosion, Chemical Stability, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
104  
14
24  
99+
Electron Configuration
[Rn] 5f14 6d2 7s2  
[Ar] 3d5 4s1  
Crystal Structure
Hexagonal Close Packed (HCP)  
Body Centered Cubic (BCC)  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
104  
14
24  
99+
Number of Neutrons
157  
8
28  
99+
Number of Electrons
104  
14
24  
99+
Radius of an Atom
  
  
Atomic Radius
150.00 pm  
35
128.00 pm  
99+
Covalent Radius
157.00 pm  
33
139.00 pm  
99+
Van der Waals Radius
250.00 pm  
10
200.00 pm  
35
Atomic Weight
267.00 amu  
11
52.00 amu  
99+
Atomic Volume
23.20 cm3/mol  
15
7.23 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Lawrencium
  
Vanadium
  
Next Element
Dubnium
  
Manganese
  
Valence Electron Potential
6.00 (-eV)  
99+
170.00 (-eV)  
4
Lattice Constant
-  
291.00 pm  
99+
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.60  
22
1.86  
4
Mechanical
Density
  
  
Density At Room Temperature
23.20 g/cm3  
8
7.19 g/cm3  
99+
Density When Liquid (at m.p.)
23.20 g/cm3  
9
6.30 g/cm3  
99+
Tensile Strength
23.00 MPa  
99+
689.00 MPa  
7
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
26
Vapor Pressure at 2000 K
0.00 (Pa)  
99+
774.00 (Pa)  
1
Elasticity properties
  
  
Shear Modulus
23.00 GPa  
99+
115.00 GPa  
9
Bulk Modulus
0.00 GPa  
99+
160.00 GPa  
11
Young's Modulus
12.80 GPa  
99+
279.00 GPa  
8
Poisson Ratio
0.30  
14
0.21  
33
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
23.00  
10
7.19  
99+
Magnetic Ordering
-  
Antiferromagnetic  
Permeability
0.00 H/m  
10
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
10
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
0.29 nΩ·m  
99+
125.00 nΩ·m  
27
Electrical Conductivity
0.00 106/cm Ω  
99+
0.08 106/cm Ω  
30
Electron Affinity
50.00 kJ/mol  
26
64.30 kJ/mol  
17
Thermal
Specific Heat
0.27 J/(kg K)  
19
0.45 J/(kg K)  
12
Molar Heat Capacity
23.20 J/mol·K  
99+
23.35 J/mol·K  
99+
Thermal Conductivity
0.23 W/m·K  
99+
93.90 W/m·K  
17
Critical Temperature
2,400.00 K  
12
1,907.00 K  
24
Thermal Expansion
23.20 µm/(m·K)  
17
4.90 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
580.00 kJ/mol  
12
348.80 kJ/mol  
35
Enthalpy of Fusion
-  
15.31 kJ/mol  
20
Enthalpy of Atomization
580.00 kJ/mol  
14
397.50 kJ/mol  
27
Standard Molar Entropy
57.60 J/mol.K  
28
23.80 J/mol.K  
99+
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