Atomic Structure of Neodymium and Protactinium
Atomic Properties
Atomic Number
60
99+
91
27
Electron Configuration
[Xe] 4f4 6s2
[Rn] 5f2 6d1 7s2
Crystal Structure
Double Hexagonal Close Packed (DHCP)
Tetragonal (TETR)
Crystal Lattice
DHCP-Crystal-Structure-of-Neodymium.jpg#100
TETR-Crystal-Structure-of-Protactinium.jpg#100
Atom
Number of Protons
60
99+
91
27
Number of Neutrons
84
40
122
21
Number of Electrons
60
99+
91
27
Radius of an Atom
Atomic Radius
181.00 pm
13
163.00 pm
25
Covalent Radius
201.00 pm
10
200.00 pm
11
Van der Waals Radius
229.00 pm
20
243.00 pm
11
Atomic Weight
144.24 amu
99+
231.04 amu
24
Atomic Volume
20.60 cm3/mol
18
15.00 cm3/mol
34
Adjacent Atomic Numbers
Valence Electron Potential
43.40 (-eV)
99+
92.00 (-eV)
11
Lattice Constant
365.80 pm
30
392.50 pm
23
Lattice Angles
π/2, π/2, 2 π/3
π/2, π/2, π/2
Lattice C/A Ratio
1.61
4
Not Available
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