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Lanthanide Series
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Atomic Structure of Lanthanum
f
Lanthanum
Summary
Periodic Table
Facts
Uses
Physical
Chemical
Atomic
Mechanical
Magnetic
Thermal
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Atomic
Atomic Number
57 59
Electron Configuration
[Xe] 5d
2
6s
2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100
Atom
Number of Protons
57 58
Number of Neutrons
82 42
Number of Electrons
57 58
Radius of an Atom
Atomic Radius
187.00 pm 10
Covalent Radius
207.00 pm 6
Van der Waals Radius
240.00 pm 17
Atomic Weight
138.91 amu 53
Atomic Volume
20.73 cm3/mol 26
Adjacent Atomic Numbers
Previous Element
28
Next Element
49
Valence Electron Potential
40.71 (-eV) 47
Lattice Constant
377.20 pm 31
Lattice Angles
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.62 16
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Lanthanide Series
Europium
Promethium
Thulium
Ytterbium
Terbium
Dysprosium
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