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Fermium vs Calcium


Calcium vs Fermium


Periodic Table

Symbol
Fm   
Ca   

Group Number
Not Available   
2   
16

Period Number
7   
4   

Block
f block   
s block   

Element Family
Actinide   
Alkaline Earth   

CAS Number
7440724   
19
7440702   
21

Space Group Name
Not Available   
Fm_ 3m   

Space Group Number
Not Available   
225.00   
2

Facts

Interesting Facts
  • Fermium metal is highly radioactive in nature.
  • Fermium is synthetically produced metal.
  
  • Calcium ranks 5th rank in the list of earth’s abundance Percentage.
  • It is found in the compound state.
  • Gypsum or calcium sulfate is used as plaster and plaster of paris.
  

Sources
Bombarding Pu-239 with Neutrons   
Earth's crust, Found in Minerals, Mining, Ores of Minerals   

History
  
  

Who Discovered
Lawrence Berkeley National Laboratory   
Humphry Davy   

Discovery
In 1952   
In 1808   

Abundance
  
  

Abundance In Universe
Not Available   
7 * 10-3 %   
3

Abundance In Sun
~-9999 %   
~0.007 %   
4

Abundance In Meteorites
Not Available   
1.10 %   
4

Abundance In Earth's Crust
Not Available   
5.00 %   
3

Abundance In Oceans
Not Available   
0.00 %   
5

Abundance In Humans
Not Available   
1.40 %   
1

Uses

Uses & Benefits
  • Currently known uses of Fermium metal are limited to research purpose only.
  
  • It is used as a reducing agent while preparing metals like thorium and uranium. It is also used as an alloying agent for metals such as aluminum, copper & lead.
  • Calcium carbonate or lime stone is used in cement.
  

Industrial Uses
NA   
Chemical Industry   

Medical Uses
NA   
Dentistry, Pharmaceutical Industry   

Other Uses
NA   
Alloys   

Biological Properties
  
  

Toxicity
Unknown   
Non Toxic   

Present in Human Body
No   
Yes   

In Blood
0.00 Blood/mg dm-3   
37
60.50 Blood/mg dm-3   
4

In Bone
0.00 p.p.m.   
36
170,000.00 p.p.m.   
1

Physical Properties

Melting Point
1,527.00 °C   
26
839.00 °C   
99+

Boiling Point
Not Available   
1,484.00 °C   
99+

Appearance
  
  

Physical State
Solid   
Solid   

Color
Unknown   
Gray   

Luster
Not Defined   
NA   

Hardness
  
  

Mohs Hardness
Not Available   
1.75   
17

Brinell Hardness
Not Available   
170.00 MPa   
99+

Speed of Sound
Not Available   
3,810.00 m/s   
19

Optical Properties
  
  

Allotropes
No   
No   

α Allotropes
Not Available   
Not Available   

β Allotropes
Not Available   
Not Available   

γ Allotropes
Not Available   
Not Available   

Chemical Properties

Chemical Formula
Fm   
Ca   

Isotopes
  
  

Known Isotopes
18   
21
19   
20

Electronegativity
  
  

Pauling Electronegativity
1.30   
32
1.00   
99+

Sanderson Electronegativity
Not Available   
0.95   
24

Allred Rochow Electronegativity
1.20   
27
1.04   
34

Mulliken-Jaffe Electronegativity
Not Available   
1.08   
17

Allen Electronegativity
Not Available   
1.03   
39

Electropositivity
  
  

Pauling Electropositivity
2.70   
22
3.00   
9

Ionization Energies
  
  

1st Energy Level
627.00 kJ/mol   
99+
589.80 kJ/mol   
99+

2nd Energy Level
1,225.00 kJ/mol   
99+
1,145.40 kJ/mol   
99+

3rd Energy Level
2,363.00 kJ/mol   
99+
4,912.40 kJ/mol   
7

4th Energy Level
3,792.00 kJ/mol   
99+
6,491.00 kJ/mol   
7

5th Energy Level
Not Available   
8,153.00 kJ/mol   
7

6th Energy Level
Not Available   
10,496.00 kJ/mol   
8

7th Energy level
Not Available   
12,270.00 kJ/mol   
12

8th Energy Level
Not Available   
14,206.00 kJ/mol   
15

9th Energy Level
Not Available   
18,191.00 kJ/mol   
12

10th Energy Level
Not Available   
20,385.00 kJ/mol   
16

11th Energy Level
Not Available   
57,110.00 kJ/mol   
3

12th Energy Level
Not Available   
63,410.00 kJ/mol   
3

13th Energy Level
Not Available   
70,110.00 kJ/mol   
3

14th Energy Level
Not Available   
78,890.00 kJ/mol   
4

15th Energy Level
Not Available   
86,310.00 kJ/mol   
5

16th Energy Level
Not Available   
94,000.00 kJ/mol   
6

17th Energy Level
Not Available   
104,900.00 kJ/mol   
7

18th Energy Level
Not Available   
111,711.00 kJ/mol   
8

Electrochemical Equivalent
3.20 g/amp-hr   
13
0.75 g/amp-hr   
99+

Electron Work Function
Not Available   
2.87 eV   
38

Other Chemical Properties
Ionization, Radioactive Isotopes, Radioactivity   
Chemical Stability, Flammability, Ionization, Solubility   

Atomic Properties

Atomic Number
100   
18
20   
99+

Electron Configuration
[Rn] 5f12 7s2   
[Ar] 4s2   

Crystal Structure
Not Known   
Face Centered Cubic (FCC)   

Crystal Lattice
Unknown-Crystal-Structure-of-Fermium.jpg#100   
FCC-Crystal-Structure-of-Calcium.jpg#100   

Atom
  
  

Number of Protons
100   
18
20   
99+

Number of Neutrons
157   
7
20   
99+

Number of Electrons
100   
18
20   
99+

Radius of an Atom
  
  

Atomic Radius
Not Available   
197.00 pm   
6

Covalent Radius
Not Available   
176.00 pm   
22

Van der Waals Radius
245.00 pm   
9
231.00 pm   
19

Atomic Weight
257.00 amu   
15
40.08 amu   
99+

Atomic Volume
Not Available   
29.90 cm3/mol   
7

Adjacent Atomic Numbers
  
  

Previous Element
Potassium
  

Next Element
Scandium
  

Valence Electron Potential
Not Available   
29.00 (-eV)   
99+

Lattice Constant
Not Available   
558.84 pm   
9

Lattice Angles
NA   
π/2, π/2, π/2   

Lattice C/A Ratio
Not Available   
Not Available   

Mechanical Properties

Density
  
  

Density At Room Temperature
Not Available   
1.55 g/cm3   
99+

Density When Liquid (at m.p.)
Not Available   
1.38 g/cm3   
99+

Tensile Strength
Not Available   
Not Available   

Viscosity
Not Available   
Not Available   

Vapor Pressure
  
  

Vapor Pressure at 1000 K
Not Available   
25.50 (Pa)   
3

Elasticity properties
  
  

Shear Modulus
Not Available   
7.40 GPa   
99+

Bulk Modulus
Not Available   
17.00 GPa   
99+

Young's Modulus
Not Available   
20.00 GPa   
99+

Poisson Ratio
Not Available   
0.31   
13

Other Mechanical Properties
NA   
NA   

Magnetic Properties

Magnetic Characteristics
  
  

Specific Gravity
Not Available   
4.58   
99+

Magnetic Ordering
Unknown   
Diamagnetic   

Electrical Properties
  
  

Electrical Property
Unknown   
Conductor   

Resistivity
Not Available   
33.60 nΩ·m   
99+

Electrical Conductivity
Not Available   
0.30 106/cm Ω   
6

Electron Affinity
Not Available   
2.37 kJ/mol   
39

Thermal Properties

Specific Heat
Not Available   
0.63 J/(kg K)   
7

Molar Heat Capacity
Not Available   
25.93 J/mol·K   
34

Thermal Conductivity
Not Available   
201.00 W/m·K   
5

Critical Temperature
Not Available   
Not Available   

Thermal Expansion
Not Available   
22.30 µm/(m·K)   
19

Enthalpy
  
  

Enthalpy of Vaporization
Not Available   
150.00 kJ/mol   
99+

Enthalpy of Fusion
Not Available   
8.54 kJ/mol   
99+

Enthalpy of Atomization
Not Available   
184.00 kJ/mol   
99+

Standard Molar Entropy
Not Available   
41.60 J/mol.K   
36

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