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Curium vs Gold

Curium
Gold
Gold vs Curium


Periodic Table
Symbol
Cm  
Au  
Group Number
3  
15
11  
7
Period Number
7  
6  
Block
f block  
d block  
Element Family
Actinide  
Transition Metal  
CAS Number
7440519  
36
7440575  
31
Space Group Name
-  
Fm_ 3m  
Space Group Number
225.00  
3
225.00  
3
Facts
Interesting Facts
  • Curium metal does not occur free in nature.
  • Curium metal is a synthetically produced metal.
  
  • It is found in copper ores and from the crust of the earth.
  • It is the most malleable and ductile metal.
  • Gold alloys are used in Dentistry as fillings, crowning, clips, etc. It is also used as an artificial limb joints.
  
Sources
Bombarding Plutonium with Helium Ions  
Earth's crust, Mining, Ores of metals  
History
  
  
Who Discovered
Glenn T. Seaborg, Ralph A. James, Albert Ghiorso  
-  
Discovery
In 1944  
Before 6000 BCE  
Abundance
  
  
Abundance In Universe
0.00 %  
35
0.00 %  
27
Abundance In Sun
0.00 %  
30
0.00 %  
26
Abundance In Meteorites
0.00 %  
99+
0.00 %  
99+
Abundance In Earth's Crust
0.00 %  
99+
0.00 %  
99+
Abundance In Oceans
-  
0.00 %  
21
Abundance In Humans
0.00 %  
24
0.00 %  
21
Uses
Uses & Benefits
  • Curium metal is used to provide power to electrical equipment for space missions.
  
  • Gold metal is mainly used for Jewelry, bullion, coinage, etc.
  • It is used in the art, decoration, ornaments, etc. It is also used for electroplating process.
  
Industrial Uses
-  
Chemical Industry, Clothing Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
Dentistry, Pharmaceutical Industry  
Other Uses
Research Purposes  
Alloys, Bullion, Coinage, Jewellery, Sculptures, Statues  
Biological Properties
  
  
Toxicity
-  
Non Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
38
In Bone
0.00 p.p.m.  
99+
0.02 p.p.m.  
35
Physical
Melting Point
1,340.00 °C  
34
1,064.43 °C  
99+
Boiling Point
3,110.00 °C  
31
2,807.00 °C  
37
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
Gold  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
2.00  
17
2.50  
15
Brinell Hardness
320.00 MPa  
40
194.00 MPa  
99+
Vickers Hardness
461.00 MPa  
37
216.00 MPa  
99+
Speed of Sound
2,260.00 m/s  
99+
2,030.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
0.47  
99+
Reflectivity
60.00 %  
23
95.00 %  
2
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Cm  
Au  
Isotopes
  
  
Known Isotopes
15  
24
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
2.54  
2
Sanderson Electronegativity
1.30  
25
1.50  
18
Allred Rochow Electronegativity
1.20  
28
1.42  
19
Mulliken-Jaffe Electronegativity
1.30  
33
1.87  
15
Allen Electronegativity
1.30  
40
1.92  
7
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
1.46  
99+
Ionization Energies
  
  
1st Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
8
2nd Energy Level
1,196.00 kJ/mol  
99+
1,980.00 kJ/mol  
12
3rd Energy Level
2,026.00 kJ/mol  
99+
2,856.00 kJ/mol  
33
4th Energy Level
3,550.00 kJ/mol  
99+
890.10 kJ/mol  
99+
5th Energy Level
5,810.00 kJ/mol  
99+
8,901.00 kJ/mol  
6
6th Energy Level
5,810.00 kJ/mol  
99+
8,901.00 kJ/mol  
24
7th Energy level
5,810.00 kJ/mol  
99+
8,901.00 kJ/mol  
21
8th Energy Level
5,810.00 kJ/mol  
99+
8,900.00 kJ/mol  
20
9th Energy Level
6,690.00 kJ/mol  
37
8,901.00 kJ/mol  
20
10th Energy Level
5,810.00 kJ/mol  
99+
8,901.00 kJ/mol  
21
11th Energy Level
5,810.00 kJ/mol  
99+
8,901.00 kJ/mol  
19
12th Energy Level
58,100.00 kJ/mol  
19
8,900.00 kJ/mol  
39
13th Energy Level
5,810.00 kJ/mol  
99+
8,900.00 kJ/mol  
14
14th Energy Level
5,810.00 kJ/mol  
40
890.10 kJ/mol  
99+
15th Energy Level
58,100.00 kJ/mol  
99+
89,000.00 kJ/mol  
7
16th Energy Level
58,100.00 kJ/mol  
99+
890.10 kJ/mol  
99+
17th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
25
18th Energy Level
5,810.00 kJ/mol  
99+
8,901.00 kJ/mol  
14
19th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
23
20th Energy Level
581.00 kJ/mol  
99+
890.00 kJ/mol  
13
21st Energy Level
5,810.00 kJ/mol  
20
890.10 kJ/mol  
35
22nd Energy Level
581.00 kJ/mol  
99+
890.00 kJ/mol  
11
23rd Energy Level
5,810.00 kJ/mol  
20
890.10 kJ/mol  
38
24th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
6
25th Energy Level
581.00 kJ/mol  
99+
890.00 kJ/mol  
5
26th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
5
27th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
4
28th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
7
29th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
8
30th Energy Level
581.00 kJ/mol  
99+
890.10 kJ/mol  
5
Electrochemical Equivalent
3.07 g/amp-hr  
19
2.45 g/amp-hr  
25
Electron Work Function
4.50 eV  
19
5.10 eV  
8
Other Chemical Properties
Ionization, Radioactive Isotopes  
Chemical Stability, Ionization, Solubility  
Atomic
Atomic Number
96  
22
79  
37
Electron Configuration
[Rn] 5f7 6d1 7s2  
[Xe] 4f14 5d10 6s1  
Crystal Structure
Double Hexagonal Close Packed (DHCP)  
Face Centered Cubic (FCC)  
Crystal Lattice
DHCP-Crystal-Structure-of-Curium.jpg#100  
FCC-Crystal-Structure-of-Gold.jpg#100  
Atom
  
  
Number of Protons
96  
22
79  
37
Number of Neutrons
151  
11
118  
24
Number of Electrons
96  
22
79  
37
Radius of an Atom
  
  
Atomic Radius
174.00 pm  
22
151.00 pm  
34
Covalent Radius
169.00 pm  
28
144.00 pm  
99+
Van der Waals Radius
200.00 pm  
35
166.00 pm  
99+
Atomic Weight
247.00 amu  
18
196.97 amu  
33
Atomic Volume
18.28 cm3/mol  
38
10.20 cm3/mol  
99+
Adjacent Atomic Numbers
  
  
Previous Element
Americium
  
Platinum
  
Next Element
Berkelium
  
Mercury
  
Valence Electron Potential
44.50 (-eV)  
39
43.40 (-eV)  
99+
Lattice Constant
336.25 pm  
99+
407.82 pm  
24
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.67  
11
1.61  
18
Mechanical
Density
  
  
Density At Room Temperature
13.51 g/cm3  
26
19.30 g/cm3  
15
Density When Liquid (at m.p.)
13.85 g/cm3  
25
17.31 g/cm3  
16
Tensile Strength
350.00 MPa  
12
120.00 MPa  
27
Viscosity
0.00  
25
0.00  
23
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
22
0.00 (Pa)  
25
Vapor Pressure at 2000 K
0.00 (Pa)  
24
67.00 (Pa)  
4
Elasticity properties
  
  
Shear Modulus
32.00 GPa  
24
27.00 GPa  
34
Bulk Modulus
40.00 GPa  
38
180.00 GPa  
9
Young's Modulus
0.00 GPa  
99+
79.00 GPa  
26
Poisson Ratio
0.35  
9
0.40  
4
Other Mechanical Properties
-  
Ductile, Malleable  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
13.51  
28
19.32  
17
Magnetic Ordering
Antiferromagnetic  
Diamagnetic  
Permeability
0.00 H/m  
17
0.00 H/m  
10
Susceptibility
0.00  
24
0.00  
22
Electrical Properties
  
  
Electrical Property
-  
Conductor  
Resistivity
1.25 nΩ·m  
99+
2.20 nΩ·m  
99+
Electrical Conductivity
0.13 106/cm Ω  
19
0.45 106/cm Ω  
3
Electron Affinity
0.00 kJ/mol  
99+
222.80 kJ/mol  
1
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.13 J/(kg K)  
40
Molar Heat Capacity
27.50 J/mol·K  
21
25.42 J/mol·K  
99+
Thermal Conductivity
11.00 W/m·K  
99+
318.00 W/m·K  
3
Critical Temperature
1,340.00 K  
99+
1,337.00 K  
99+
Thermal Expansion
11.60 µm/(m·K)  
99+
14.20 µm/(m·K)  
29
Enthalpy
  
  
Enthalpy of Vaporization
331.60 kJ/mol  
40
324.40 kJ/mol  
99+
Enthalpy of Fusion
15.00 kJ/mol  
22
12.55 kJ/mol  
33
Enthalpy of Atomization
-  
364.00 kJ/mol  
34
Standard Molar Entropy
52.50 J/mol.K  
36
47.40 J/mol.K  
99+
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