Atomic Structure of Thallium and Neptunium
Atomic Properties
Atomic Number
81
35
93
25
Electron Configuration
[Xe] 4f14 5d10 6s2 6p1
[Rn] 5f4 6d1 7s2
Crystal Structure
Hexagonal Close Packed (HCP)
Orthorhombic (ORTH)
Crystal Lattice
BCC-Crystal-Structure-.jpg#100
ORTH-Crystal-Structure-of-Neptunium.jpg#100
Atom
Number of Protons
81
35
93
25
Number of Neutrons
123
20
144
14
Number of Electrons
81
35
93
25
Radius of an Atom
Atomic Radius
170.00 pm
22
155.00 pm
30
Covalent Radius
145.00 pm
39
190.00 pm
18
Van der Waals Radius
196.00 pm
30
221.00 pm
22
Atomic Weight
204.38 amu
31
237.00 amu
22
Atomic Volume
17.20 cm3/mol
31
11.62 cm3/mol
99+
Adjacent Atomic Numbers
Valence Electron Potential
9.60 (-eV)
99+
96.00 (-eV)
9
Lattice Constant
345.66 pm
99+
666.30 pm
3
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.60
6
Not Available
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