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Lawrencium vs Nobelium

Lawrencium
Nobelium
Nobelium vs Lawrencium


Periodic Table
Symbol
Lr  
No  
Group Number
3  
15
3  
15
Period Number
7  
7  
Block
d block  
f block  
Element Family
Actinide  
Actinide  
CAS Number
22537195  
15
10028145  
16
Space Group Name
-  
-  
Space Group Number
225.00  
3
194.00  
7
Facts
Interesting Facts
  • It is synthetically produced metal.
  • Radiation hazard can be produce by it.
  
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  
Sources
Bombarding Californium-252 with Boron Nuclei, Found in Minerals, Mining  
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining  
History
  
  
Who Discovered
Lawrence Berkeley National Laboratory and Joint Institute for Nuclear Research  
Joint Institute for Nuclear Research  
Discovery
In 1961–1971  
In 1966  
Abundance
  
  
Abundance In Universe
0.00 %  
40
-  
Abundance In Sun
-  
-  
Abundance In Meteorites
0.00 %  
99+
-  
Abundance In Earth's Crust
0.00 %  
99+
-  
Abundance In Oceans
-  
-  
Abundance In Humans
-  
-  
Uses
Uses & Benefits
  • Currently known uses of Lawrencium metal are limited to research purpose only.
  
  • Currently known uses of Nobelium metal are limited to research purpose only.
  
Industrial Uses
-  
-  
Medical Uses
-  
-  
Other Uses
-  
Research Purposes  
Biological Properties
  
  
Toxicity
-  
-  
Present in Human Body
No  
No  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
40
In Bone
0.00 p.p.m.  
99+
0.00 p.p.m.  
99+
Physical
Melting Point
1,627.00 °C  
20
827.00 °C  
99+
Boiling Point
0.00 °C  
99+
2,600.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silver  
-  
Luster
Unknown Luster  
Unknown Luster  
Hardness
  
  
Mohs Hardness
-  
-  
Brinell Hardness
500.00 MPa  
28
500.00 MPa  
28
Vickers Hardness
500.00 MPa  
35
500.00 MPa  
35
Speed of Sound
2,760.00 m/s  
99+
1,100.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.30  
99+
Reflectivity
65.00 %  
18
61.00 %  
22
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
Lr  
No  
Isotopes
  
  
Known Isotopes
10  
28
13  
26
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
1.30  
33
Sanderson Electronegativity
1.30  
25
1.30  
25
Allred Rochow Electronegativity
1.30  
25
1.20  
28
Mulliken-Jaffe Electronegativity
1.30  
33
1.30  
33
Allen Electronegativity
1.30  
40
1.10  
99+
Electropositivity
  
  
Pauling Electropositivity
2.00  
99+
2.70  
22
Ionization Energies
  
  
1st Energy Level
470.00 kJ/mol  
99+
642.00 kJ/mol  
99+
2nd Energy Level
1,428.00 kJ/mol  
99+
1,254.00 kJ/mol  
99+
3rd Energy Level
2,228.00 kJ/mol  
99+
2,643.00 kJ/mol  
99+
4th Energy Level
4,910.00 kJ/mol  
31
3,956.00 kJ/mol  
99+
5th Energy Level
4,780.00 kJ/mol  
99+
6,400.00 kJ/mol  
35
6th Energy Level
4,780.00 kJ/mol  
99+
6,400.00 kJ/mol  
99+
7th Energy level
4,780.00 kJ/mol  
99+
6,270.00 kJ/mol  
99+
8th Energy Level
4,780.00 kJ/mol  
99+
6,270.00 kJ/mol  
99+
9th Energy Level
4,780.00 kJ/mol  
99+
6,270.00 kJ/mol  
99+
10th Energy Level
5,800.00 kJ/mol  
99+
6,270.00 kJ/mol  
99+
11th Energy Level
5,800.00 kJ/mol  
99+
6,420.00 kJ/mol  
99+
12th Energy Level
47,800.00 kJ/mol  
22
64,000.00 kJ/mol  
8
13th Energy Level
4,780.00 kJ/mol  
99+
6,400.00 kJ/mol  
36
14th Energy Level
1,186.00 kJ/mol  
99+
6,400.00 kJ/mol  
26
15th Energy Level
47,800.00 kJ/mol  
99+
64,000.00 kJ/mol  
36
16th Energy Level
470.00 kJ/mol  
99+
64,000.00 kJ/mol  
27
17th Energy Level
1,186.00 kJ/mol  
15
641.00 kJ/mol  
99+
18th Energy Level
4,780.00 kJ/mol  
99+
3,500.00 kJ/mol  
99+
19th Energy Level
1,186.00 kJ/mol  
12
627.60 kJ/mol  
99+
20th Energy Level
860.00 kJ/mol  
17
627.00 kJ/mol  
99+
21st Energy Level
1,186.00 kJ/mol  
27
917.00 kJ/mol  
34
22nd Energy Level
388.00 kJ/mol  
99+
627.00 kJ/mol  
36
23rd Energy Level
1,180.00 kJ/mol  
32
6,410.00 kJ/mol  
12
24th Energy Level
546.10 kJ/mol  
99+
627.00 kJ/mol  
39
25th Energy Level
0.00 kJ/mol  
99+
0.00 kJ/mol  
99+
26th Energy Level
594.70 kJ/mol  
99+
601.20 kJ/mol  
99+
27th Energy Level
470.00 kJ/mol  
99+
641.00 kJ/mol  
37
28th Energy Level
478.00 kJ/mol  
99+
641.60 kJ/mol  
99+
29th Energy Level
580.00 kJ/mol  
99+
641.00 kJ/mol  
99+
30th Energy Level
0.00 kJ/mol  
99+
627.00 kJ/mol  
99+
Electrochemical Equivalent
3.23 g/amp-hr  
12
4.83 g/amp-hr  
4
Electron Work Function
4.90 eV  
12
4.90 eV  
12
Other Chemical Properties
Ionization, Radioactive Isotopes  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
103  
15
102  
16
Electron Configuration
[Rn] 5f14 7s2 7p1  
[Rn] 5f14 7s2  
Crystal Structure
Hexagonal Close Packed (HCP)  
Not Known  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
Unknown-Crystal-Structure-of-Nobelium.jpg#100  
Atom
  
  
Number of Protons
103  
15
102  
16
Number of Neutrons
157  
8
157  
8
Number of Electrons
103  
15
102  
16
Radius of an Atom
  
  
Atomic Radius
162.00 pm  
28
176.00 pm  
20
Covalent Radius
162.00 pm  
31
157.00 pm  
33
Van der Waals Radius
246.00 pm  
12
246.00 pm  
12
Atomic Weight
266.00 amu  
12
259.00 amu  
13
Atomic Volume
35.10 cm3/mol  
7
19.80 cm3/mol  
33
Adjacent Atomic Numbers
  
  
Previous Element
Nobelium
  
Mendelevium
  
Next Element
Rutherfordium
  
Lawrencium
  
Valence Electron Potential
0.00 (-eV)  
99+
26.00 (-eV)  
99+
Lattice Constant
530.00 pm  
14
-  
Lattice Angles
-  
-  
Lattice C/A Ratio
1.60  
22
1.76  
5
Mechanical
Density
  
  
Density At Room Temperature
15.00 g/cm3  
22
9.90 g/cm3  
99+
Density When Liquid (at m.p.)
15.60 g/cm3  
20
9.90 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
80.00 MPa  
29
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
37
Vapor Pressure at 2000 K
0.00 (Pa)  
37
0.00 (Pa)  
28
Elasticity properties
  
  
Shear Modulus
30.00 GPa  
27
27.00 GPa  
34
Bulk Modulus
15.00 GPa  
99+
8.70 GPa  
99+
Young's Modulus
210.00 GPa  
10
12.30 GPa  
99+
Poisson Ratio
0.32  
12
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
15.60  
22
9.90  
99+
Magnetic Ordering
-  
-  
Permeability
0.00 H/m  
13
0.00 H/m  
3
Susceptibility
0.00  
23
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
-  
Resistivity
8.37 nΩ·m  
99+
0.68 nΩ·m  
99+
Electrical Conductivity
0.00 106/cm Ω  
99+
0.00 106/cm Ω  
99+
Electron Affinity
50.00 kJ/mol  
26
50.00 kJ/mol  
26
Thermal
Specific Heat
0.22 J/(kg K)  
29
0.10 J/(kg K)  
99+
Molar Heat Capacity
27.00 J/mol·K  
29
27.00 J/mol·K  
29
Thermal Conductivity
0.00 W/m·K  
99+
0.10 W/m·K  
99+
Critical Temperature
1,323.00 K  
99+
1,100.00 K  
99+
Thermal Expansion
8.50 µm/(m·K)  
99+
11.00 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
341.90 kJ/mol  
37
-  
Enthalpy of Fusion
-  
-  
Enthalpy of Atomization
580.00 kJ/mol  
14
390.40 kJ/mol  
30
Standard Molar Entropy
54.80 J/mol.K  
35
63.00 J/mol.K  
24
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