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Sodium vs Mendelevium

Sodium
Mendelevium
Mendelevium vs Sodium


Periodic Table
Symbol
-  
Md  
Group Number
1  
17
3  
15
Period Number
3  
7  
Block
s block  
f block  
Element Family
Alkali  
Actinide  
CAS Number
7440235  
99+
7440111  
99+
Space Group Name
Im_ 3m  
-  
Space Group Number
229.00  
2
194.00  
7
Facts
Interesting Facts
  • At room temperature Sodium metal is very soft as it can be chopped down into pieces with butter knife.
  • The most common compound of Sodium is NaCl (Salt).
  
  • Mendelevium metal is synthetically produced metal.
  • Mendelevium metal has been produced in only trace amount.
  
Sources
By Electrolysis Process, Mining  
Bombarding Einsteinium with Helium Ions  
History
  
  
Who Discovered
Humphry Davy  
Lawrence Berkeley National Laboratory  
Discovery
In 1807  
In 1955  
Abundance
  
  
Abundance In Universe
0.00 %  
7
0.00 %  
40
Abundance In Sun
0.00 %  
6
-  
Abundance In Meteorites
0.55 %  
6
0.00 %  
99+
Abundance In Earth's Crust
2.30 %  
5
-  
Abundance In Oceans
1.10 %  
1
-  
Abundance In Humans
0.14 %  
4
0.00 %  
24
Uses
Uses & Benefits
  • In some nuclear reactors sodium is used as a heat exchanger.
  • Compound of Sodium metals called Salt (Sodium chloride) is used in Food.
  
  • Currently known uses of Mendelevium metal are limited to research purpose only.
  
Industrial Uses
Electrical Industry, Electronic Industry  
-  
Medical Uses
Pharmaceutical Industry  
-  
Other Uses
Alloys  
-  
Biological Properties
  
  
Toxicity
Toxic  
-  
Present in Human Body
Yes  
No  
In Blood
1,970.00 Blood/mg dm-3  
1
0.00 Blood/mg dm-3  
40
In Bone
10,000.00 p.p.m.  
2
0.00 p.p.m.  
99+
Physical
Melting Point
97.72 °C  
99+
827.00 °C  
99+
Boiling Point
883.00 °C  
99+
0.00 °C  
99+
Appearance
  
  
Physical State
Solid  
Solid  
Color
Silvery White  
-  
Luster
Metallic  
Metallic  
Hardness
  
  
Mohs Hardness
0.50  
24
-  
Brinell Hardness
0.69 MPa  
99+
350.00 MPa  
36
Vickers Hardness
0.69 MPa  
99+
0.00 MPa  
99+
Speed of Sound
3,200.00 m/s  
35
2,680.00 m/s  
99+
Optical Properties
  
  
Refractive Index
1.33  
99+
1.30  
99+
Reflectivity
53.00 %  
28
66.00 %  
17
Allotropes
No  
No  
α Allotropes
-  
-  
β Allotropes
-  
-  
γ Allotropes
-  
-  
Chemical
Chemical Formula
-  
Md  
Isotopes
  
  
Known Isotopes
17  
22
16  
23
Electronegativity
  
  
Pauling Electronegativity
0.93  
99+
1.30  
33
Sanderson Electronegativity
0.56  
99+
1.30  
25
Allred Rochow Electronegativity
1.01  
36
1.20  
28
Mulliken-Jaffe Electronegativity
0.91  
99+
1.30  
33
Allen Electronegativity
0.87  
99+
1.30  
40
Electropositivity
  
  
Pauling Electropositivity
3.07  
6
2.70  
22
Ionization Energies
  
  
1st Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
99+
2nd Energy Level
4,562.00 kJ/mol  
4
1,235.00 kJ/mol  
99+
3rd Energy Level
6,910.30 kJ/mol  
6
2,470.00 kJ/mol  
99+
4th Energy Level
9,543.00 kJ/mol  
5
3,840.00 kJ/mol  
99+
5th Energy Level
13,354.00 kJ/mol  
4
6,350.00 kJ/mol  
36
6th Energy Level
16,613.00 kJ/mol  
4
6,350.00 kJ/mol  
99+
7th Energy level
20,117.00 kJ/mol  
4
6,350.00 kJ/mol  
99+
8th Energy Level
25,496.00 kJ/mol  
4
6,350.00 kJ/mol  
99+
9th Energy Level
28,932.00 kJ/mol  
4
6,350.00 kJ/mol  
99+
10th Energy Level
141,362.00 kJ/mol  
2
6,350.00 kJ/mol  
99+
11th Energy Level
159,076.00 kJ/mol  
2
6,400.00 kJ/mol  
99+
12th Energy Level
4,950.00 kJ/mol  
99+
60,100.00 kJ/mol  
16
13th Energy Level
4,950.00 kJ/mol  
99+
6,350.00 kJ/mol  
37
14th Energy Level
495.80 kJ/mol  
99+
1,150.00 kJ/mol  
99+
15th Energy Level
49,500.00 kJ/mol  
99+
63,500.00 kJ/mol  
37
16th Energy Level
49,500.00 kJ/mol  
99+
635.00 kJ/mol  
99+
17th Energy Level
495.80 kJ/mol  
99+
1,107.00 kJ/mol  
21
18th Energy Level
4,960.00 kJ/mol  
99+
6,350.00 kJ/mol  
39
19th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
99+
20th Energy Level
496.00 kJ/mol  
99+
635.00 kJ/mol  
40
21st Energy Level
495.80 kJ/mol  
99+
6,350.00 kJ/mol  
13
22nd Energy Level
495.00 kJ/mol  
99+
635.00 kJ/mol  
34
23rd Energy Level
495.80 kJ/mol  
99+
6,350.00 kJ/mol  
13
24th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
36
25th Energy Level
496.00 kJ/mol  
99+
635.00 kJ/mol  
38
26th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
37
27th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
39
28th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
99+
29th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
99+
30th Energy Level
495.80 kJ/mol  
99+
635.00 kJ/mol  
40
Electrochemical Equivalent
0.86 g/amp-hr  
99+
3.21 g/amp-hr  
13
Electron Work Function
2.75 eV  
99+
3.89 eV  
37
Other Chemical Properties
Chemical Stability, Corrosion, Flammability, Ionization, Solubility  
Ionization, Radioactive Isotopes, Radioactivity  
Atomic
Atomic Number
11  
99+
101  
17
Electron Configuration
[Ne] 3s1  
[Rn] 5f13 7s2  
Crystal Structure
Body Centered Cubic (BCC)  
Not Known  
Crystal Lattice
BCC-Crystal-Structure-.jpg#100  
Unknown-Crystal-Structure-of-Mendelevium.jpg#100  
Atom
  
  
Number of Protons
11  
99+
101  
17
Number of Neutrons
12  
99+
157  
8
Number of Electrons
11  
99+
101  
17
Radius of an Atom
  
  
Atomic Radius
186.00 pm  
11
175.00 pm  
21
Covalent Radius
166.00 pm  
29
175.00 pm  
25
Van der Waals Radius
227.00 pm  
26
246.00 pm  
12
Atomic Weight
22.99 amu  
99+
258.00 amu  
14
Atomic Volume
23.70 cm3/mol  
14
19.90 cm3/mol  
32
Adjacent Atomic Numbers
  
  
Previous Element
Beryllium
  
Fermium
  
Next Element
Magnesium
  
Nobelium
  
Valence Electron Potential
14.10 (-eV)  
99+
63.70 (-eV)  
23
Lattice Constant
429.06 pm  
22
-  
Lattice Angles
π/2, π/2, π/2  
-  
Lattice C/A Ratio
1.01  
99+
1.58  
36
Mechanical
Density
  
  
Density At Room Temperature
0.97 g/cm3  
99+
10.30 g/cm3  
38
Density When Liquid (at m.p.)
0.93 g/cm3  
99+
10.30 g/cm3  
39
Tensile Strength
10.00 MPa  
99+
80.00 MPa  
29
Viscosity
0.00  
5
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)  
99+
0.00 (Pa)  
37
Elasticity properties
  
  
Shear Modulus
3.30 GPa  
99+
32.00 GPa  
24
Bulk Modulus
6.30 GPa  
99+
0.00 GPa  
99+
Young's Modulus
10.00 GPa  
99+
12.00 GPa  
99+
Poisson Ratio
0.37  
7
0.30  
14
Other Mechanical Properties
-  
-  
Magnetic
Magnetic Characteristics
  
  
Specific Gravity
0.97  
99+
13.50  
29
Magnetic Ordering
Paramagnetic  
-  
Permeability
0.00 H/m  
6
0.00 H/m  
11
Susceptibility
0.00  
24
0.00  
24
Electrical Properties
  
  
Electrical Property
Conductor  
-  
Resistivity
47.70 nΩ·m  
99+
0.63 nΩ·m  
99+
Electrical Conductivity
0.21 106/cm Ω  
9
0.00 106/cm Ω  
99+
Electron Affinity
52.80 kJ/mol  
24
50.00 kJ/mol  
26
Thermal
Specific Heat
1.23 J/(kg K)  
3
0.10 J/(kg K)  
99+
Molar Heat Capacity
28.23 J/mol·K  
13
27.00 J/mol·K  
29
Thermal Conductivity
142.00 W/m·K  
11
0.00 W/m·K  
99+
Critical Temperature
2,573.00 K  
10
1,100.00 K  
99+
Thermal Expansion
71.00 µm/(m·K)  
4
11.60 µm/(m·K)  
99+
Enthalpy
  
  
Enthalpy of Vaporization
89.04 kJ/mol  
99+
380.50 kJ/mol  
26
Enthalpy of Fusion
2.59 kJ/mol  
99+
-  
Enthalpy of Atomization
108.40 kJ/mol  
99+
410.80 kJ/mol  
25
Standard Molar Entropy
51.30 J/mol.K  
39
37.40 J/mol.K  
99+
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