Atomic Structure of Lanthanum and Protactinium
Electron Configuration
[Xe] 5d2 6s2
  
[Rn] 5f2 6d1 7s2
  
Crystal Structure
Double Hexagonal Close Packed (DHCP)
  
Tetragonal (TETR)
  
Crystal Lattice
DHCP-Crystal-Structure-of-Lanthanum.jpg#100
  
TETR-Crystal-Structure-of-Protactinium.jpg#100
  
Atom
  
  
Radius of an Atom
  
  
Atomic Weight
138.91 amu
  
99+
Atomic Volume
20.73 cm3/mol
  
16
15.00 cm3/mol
  
34
Adjacent Atomic Numbers
  
  
Valence Electron Potential
40.71 (-eV)
  
99+
92.00 (-eV)
  
11
Lattice Angles
π/2, π/2, 2 π/3
  
π/2, π/2, π/2
  
Lattice C/A Ratio
Not Available