Struktur atom dari thorium dan protactinium
Konfigurasi elektron
[Rn] 6d2 7s2
[Rn] 5f2 6d1 7s2
Struktur kristal
Wajah Centered Cubic (FCC)
Tetragonal (TETR)
kristal Lattice
FCC-Crystal-Structure-of-Thorium.jpg#100
TETR-Crystal-Structure-of-Protactinium.jpg#100
kisi Angles
π/2, π/2, π/2
π/2, π/2, π/2