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Thulium
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Lanthanum
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Actinide Series
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Thulium
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Lanthanum
Atomic Structure of Thulium and Lanthanum
Thulium
Lanthanum
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Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
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Atomic
Atomic Number
69
57
3
117
👆🏻
Electron Configuration
[Xe] 4f
13
6s
2
[Xe] 5d
2
6s
2
Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
Atom
Number of Protons
69
57
3
117
👆🏻
Number of Neutrons
100
82
4
285
👆🏻
Number of Electrons
69
57
3
117
👆🏻
Radius of an Atom
Atomic Radius
176.00 pm
187.00 pm
0
348
👆🏻
Covalent Radius
160.00 pm
207.00 pm
0
260
👆🏻
Van der Waals Radius
227.00 pm
240.00 pm
0
348
👆🏻
Atomic Weight
168.93 amu
138.91 amu
6.94
294
👆🏻
Atomic Volume
18.10 cm3/mol
20.73 cm3/mol
1.39
71.07
👆🏻
Adjacent Atomic Numbers
Previous Element
Next Element
Valence Electron Potential
49.70 (-eV)
40.71 (-eV)
0
392.42
👆🏻
Lattice Constant
353.75 pm
377.20 pm
0
891.25
👆🏻
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.57
1.62
0.423
1.9
👆🏻
Compare Lanthanide Series
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Thulium vs Lutetium
Thulium vs Praseodymium
Thulium vs Promethium
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Lanthanide Series
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Ytterbium
Terbium
Dysprosium
Holmium
Lutetium
Praseodymium
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Lanthanide Series
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Lanthanum
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Compare Lanthanide Series
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Lanthanum vs Terbium
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Lanthanum vs Dysprosium
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Lanthanum vs Holmium
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