Atomic Structure of Thulium and Cerium
Atomic Properties
Atomic Number
69
99+
58
99+
Electron Configuration
[Xe] 4f13 6s2
[Xe] 4f1 5d1 6s2
Crystal Structure
Hexagonal Close Packed (HCP)
Double Hexagonal Close Packed (DHCP)
Crystal Lattice
HCP-Crystal-Structure-of-Thulium.jpg#100
DHCP-Crystal-Structure-of-Cerium.jpg#100
Atom
Number of Protons
69
99+
58
99+
Number of Neutrons
100
32
82
99+
Number of Electrons
69
99+
58
99+
Radius of an Atom
Atomic Radius
176.00 pm
18
181.80 pm
12
Covalent Radius
160.00 pm
30
204.00 pm
8
Van der Waals Radius
Not Available
235.00 pm
17
Atomic Weight
168.93 amu
99+
140.12 amu
99+
Atomic Volume
18.10 cm3/mol
28
20.67 cm3/mol
17
Adjacent Atomic Numbers
Valence Electron Potential
49.70 (-eV)
28
41.78 (-eV)
99+
Lattice Constant
353.75 pm
40
362.00 pm
34
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, 2 π/3
Lattice C/A Ratio
1.57
17
Not Available
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