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Nobelium vs Cesium

Nobelium
Cesium
Cesium vs Nobelium


Periodic Table
Symbol
No  
Cs  
Group Number
3  
15
1  
17
Period Number
7  
6  
Block
f block  
s block  
Element Family
Actinide  
Alkali  
CAS Number
10028145  
16
7440462  
40
Space Group Name
-  
Im_ 3m  
Space Group Number
194.00  
7
229.00  
2
Facts
Interesting Facts
  • The most stable isotope of Nobelium metal is No-259.
  • No-259 has a half-life of fifty-eight minutes.
  
Cesium is the most alkaline metal and is used in atomic clocks.  
Sources
Bombarding Curium-246 or Curium-249 with Carbon-12 Nuclei, Found in Minerals, Mining  
Earth's crust, Found in Minerals, Mining, Ores of Minerals  
History
  
  
Who Discovered
Joint Institute for Nuclear Research  
Robert Bunsen and Gustav Kirchhoff  
Discovery
In 1966  
In 1860  
Abundance
  
  
Abundance In Universe
-  
0.00 %  
25
Abundance In Sun
-  
0.00 %  
20
Abundance In Meteorites
-  
0.00 %  
38
Abundance In Earth's Crust
-  
0.00 %  
35
Abundance In Oceans
-  
0.00 %  
17
Abundance In Humans
-  
0.00 %  
20
Uses
Uses & Benefits
  • Currently known uses of Nobelium metal are limited to research purpose only.
  
  • The most common use of cesium metal is as a drilling fluid. It is also used in optical glass manufacturing.
  • In vacuum tubes and radiation monitor equipment this metal is used as a catalyst promoter.
  
Industrial Uses
-  
Aerospace Industry, Automobile Industry, Electrical Industry, Electronic Industry  
Medical Uses
-  
-  
Other Uses
Research Purposes  
Alloys  
Biological Properties
  
  
Toxicity
-  
Mildly Toxic  
Present in Human Body
No  
Yes  
In Blood
0.00 Blood/mg dm-3  
40
0.00 Blood/mg dm-3  
28
In Bone
0.00 p.p.m.  
99+
0.05 p.p.m.  
31
Physical
Melting Point
827.00 °C  
99+
28.50 °C  
99+
Boiling Point
2,600.00 °C  
99+
678.40 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
-  
Silvery Gold  
Luster
Unknown Luster  
-  
Hardness
  
  
Mohs Hardness
-  
0.20  
27
Brinell Hardness
500.00 MPa  
28
0.14 MPa  
99+
Vickers Hardness
500.00 MPa  
35
0.14 MPa  
99+
Speed of Sound
1,100.00 m/s  
99+
1,630.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.30  
99+
1.93  
17
Reflectivity
61.00 %  
22
35.00 %  
34
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
No  
Cs  
Isotopes
  
  
Known Isotopes
13  
26
36  
3
Electronegativity
  
  
Pauling Electronegativity
1.30  
33
0.79  
99+
Sanderson Electronegativity
1.30  
25
0.22  
99+
Allred Rochow Electronegativity
1.20  
28
0.86  
99+
Mulliken-Jaffe Electronegativity
1.30  
33
0.62  
99+
Allen Electronegativity
1.10  
99+
0.66  
99+
Electropositivity
  
  
Pauling Electropositivity
2.70  
22
3.21  
2
Ionization Energies
  
  
1st Energy Level
642.00 kJ/mol  
99+
375.70 kJ/mol  
99+
2nd Energy Level
1,254.00 kJ/mol  
99+
2,234.30 kJ/mol  
8
3rd Energy Level
2,643.00 kJ/mol  
99+
3,400.00 kJ/mol  
16
4th Energy Level
3,956.00 kJ/mol  
99+
375.70 kJ/mol  
99+
5th Energy Level
6,400.00 kJ/mol  
35
3,750.00 kJ/mol  
99+
6th Energy Level
6,400.00 kJ/mol  
99+
3,750.00 kJ/mol  
99+
7th Energy level
6,270.00 kJ/mol  
99+
3,750.00 kJ/mol  
99+
8th Energy Level
6,270.00 kJ/mol  
99+
3,760.00 kJ/mol  
99+
9th Energy Level
6,270.00 kJ/mol  
99+
3,750.00 kJ/mol  
99+
10th Energy Level
6,270.00 kJ/mol  
99+
3,757.00 kJ/mol  
99+
11th Energy Level
6,420.00 kJ/mol  
99+
3,757.00 kJ/mol  
99+
12th Energy Level
64,000.00 kJ/mol  
8
3,750.00 kJ/mol  
99+
13th Energy Level
6,400.00 kJ/mol  
36
3,750.00 kJ/mol  
99+
14th Energy Level
6,400.00 kJ/mol  
26
3,750.00 kJ/mol  
99+
15th Energy Level
64,000.00 kJ/mol  
36
37,500.00 kJ/mol  
99+
16th Energy Level
64,000.00 kJ/mol  
27
375.70 kJ/mol  
99+
17th Energy Level
641.00 kJ/mol  
99+
375.70 kJ/mol  
99+
18th Energy Level
3,500.00 kJ/mol  
99+
3,757.00 kJ/mol  
99+
19th Energy Level
627.60 kJ/mol  
99+
375.70 kJ/mol  
99+
20th Energy Level
627.00 kJ/mol  
99+
375.00 kJ/mol  
99+
21st Energy Level
917.00 kJ/mol  
34
375.70 kJ/mol  
99+
22nd Energy Level
627.00 kJ/mol  
36
375.00 kJ/mol  
99+
23rd Energy Level
6,410.00 kJ/mol  
12
375.70 kJ/mol  
99+
24th Energy Level
627.00 kJ/mol  
39
375.70 kJ/mol  
99+
25th Energy Level
0.00 kJ/mol  
99+
375.70 kJ/mol  
99+
26th Energy Level
601.20 kJ/mol  
99+
375.70 kJ/mol  
99+
27th Energy Level
641.00 kJ/mol  
37
375.70 kJ/mol  
99+
28th Energy Level
641.60 kJ/mol  
99+
375.70 kJ/mol  
99+
29th Energy Level
641.00 kJ/mol  
99+
375.70 kJ/mol  
99+
30th Energy Level
627.00 kJ/mol  
99+
375.70 kJ/mol  
99+
Electrochemical Equivalent
4.83 g/amp-hr  
4
4.96 g/amp-hr  
3
Electron Work Function
4.90 eV  
12
2.14 eV  
99+
Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity  
Chemical Stability, Corrosion, Ionization, Radioactive Isotopes, Solubility  
Atomic
Atomic Number
102  
16
55  
99+
Electron Configuration
[Rn] 5f14 7s2  
[Xe] 6s1  
Crystal Structure
Not Known  
Body Centered Cubic (BCC)  
Crystal Lattice
Unknown-Crystal-Structure-of-Nobelium.jpg#100  
BCC-Crystal-Structure-.jpg#100  
Atom
  
  
Number of Protons
102  
16
55  
99+
Number of Neutrons
157  
8
78  
99+
Number of Electrons
102  
16
55  
99+
Radius of an Atom
  
  
Atomic Radius
176.00 pm  
20
265.00 pm  
2
Covalent Radius
157.00 pm  
33
244.00 pm  
2
Van der Waals Radius
246.00 pm  
12
343.00 pm  
2
Atomic Weight
259.00 amu  
13
132.91 amu  
99+
Atomic Volume
19.80 cm3/mol  
33
71.07 cm3/mol  
1
Adjacent Atomic Numbers
  
  
Previous Element
Mendelevium
  
Tin
  
Next Element
Lawrencium
  
Barium
  
Valence Electron Potential
26.00 (-eV)  
99+
8.62 (-eV)  
99+
Lattice Constant
-  
614.10 pm  
5
Lattice Angles
-  
π/2, π/2, π/2  
Lattice C/A Ratio
1.76  
5
1.87  
3
Mechanical
Density
  
  
Density At Room Temperature
9.90 g/cm3  
99+
1.93 g/cm3  
99+
Density When Liquid (at m.p.)
9.90 g/cm3  
99+
1.84 g/cm3  
99+
Tensile Strength
80.00 MPa  
29
15.00 MPa  
99+
Viscosity
0.00  
25
0.00  
25
Vapor Pressure
  
  
Vapor Pressure at 1000 K
0.00 (Pa)  
37
0.00 (Pa)  
22
Vapor Pressure at 2000 K
0.00 (Pa)  
28
0.00 (Pa)  
30
Elasticity properties
  
  
Shear Modulus
27.00 GPa  
34
30.00 GPa  
27
Bulk Modulus
8.70 GPa  
99+
1.60 GPa  
99+
Young's Modulus
12.30 GPa  
99+
1.70 GPa  
99+
Poisson Ratio
0.30  
14
0.35  
9
Other Mechanical Properties
-  
Ductile  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
9.90  
99+
1.87  
99+
Magnetic Ordering
-  
Paramagnetic  
Permeability
0.00 H/m  
3
0.00 H/m  
17
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
-  
Semiconductor  
Resistivity
0.68 nΩ·m  
99+
205.00 nΩ·m  
17
Electrical Conductivity
0.00 106/cm Ω  
99+
0.05 106/cm Ω  
40
Electron Affinity
50.00 kJ/mol  
26
45.50 kJ/mol  
30
Thermal
Specific Heat
0.10 J/(kg K)  
99+
0.24 J/(kg K)  
23
Molar Heat Capacity
27.00 J/mol·K  
29
32.21 J/mol·K  
6
Thermal Conductivity
0.10 W/m·K  
99+
35.90 W/m·K  
37
Critical Temperature
1,100.00 K  
99+
1,938.00 K  
22
Thermal Expansion
11.00 µm/(m·K)  
99+
97.00 µm/(m·K)  
1
Enthalpy
  
  
Enthalpy of Vaporization
-  
65.90 kJ/mol  
99+
Enthalpy of Fusion
-  
2.10 kJ/mol  
99+
Enthalpy of Atomization
390.40 kJ/mol  
30
78.20 kJ/mol  
99+
Standard Molar Entropy
63.00 J/mol.K  
24
85.20 J/mol.K  
3
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