Struktur atom saka Actinium lan krom
Konfigurasi elektron
[Rn] 6D 1 7s 2
[Ar] 3d 5 4s 1
Struktur Crystal
Face tengah kubik (FCC)
Body tengah kubik (Bcc)
Crystal pola
FCC-Crystal-Structure-of-Actinium.jpg#100
BCC-Crystal-Structure-.jpg#100
pola Angles
π/2, π/2, π/2
π/2, π/2, π/2