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Fermium
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Actinide Series
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Fermium
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Thulium
Atomic Structure of Fermium and Thulium
Fermium
Thulium
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Summary
Periodic Table
Facts
Uses
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Atomic
Mechanical
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Atomic
Atomic Number
100
69
3
117
👆🏻
Electron Configuration
[Rn] 5f
12
7s
2
[Xe] 4f
13
6s
2
Crystal Structure
Not Known
Hexagonal Close Packed (HCP)
Crystal Lattice
Atom
Number of Protons
100
69
3
117
👆🏻
Number of Neutrons
157
100
4
285
👆🏻
Number of Electrons
100
69
3
117
👆🏻
Radius of an Atom
Atomic Radius
180.00 pm
176.00 pm
0
348
👆🏻
Covalent Radius
180.00 pm
160.00 pm
0
260
👆🏻
Van der Waals Radius
245.00 pm
227.00 pm
0
348
👆🏻
Atomic Weight
257.00 amu
168.93 amu
6.94
294
👆🏻
Atomic Volume
18.00 cm3/mol
18.10 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
0.00 (-eV)
49.70 (-eV)
0
392.42
👆🏻
Lattice Constant
350.00 pm
353.75 pm
0
891.25
👆🏻
Lattice Angles
-
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.63
1.57
0.423
1.9
👆🏻
Compare Actinide Series
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Fermium vs Curium
Fermium vs Lawrencium
Fermium vs Americium
» More Compare Actinide Series
Actinide Series
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Mendelevium
Berkelium
Protactinium
Nobelium
Curium
Lawrencium
» More Actinide Series
Actinide Series
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Americium
Periodic ...
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Physical
Neptunium
Periodic ...
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Facts
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Uses
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Physical
Actinium
Periodic ...
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Facts
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Uses
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Physical
Compare Actinide Series
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Thulium vs Berkelium
Periodic ...
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Facts
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Uses
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Physical
Thulium vs Protactinium
Periodic ...
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Facts
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Uses
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Physical
Thulium vs Nobelium
Periodic ...
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Facts
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Uses
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Physical