Actinium – Ac89
Atomic Number 89 | Atomic Symbol Ac | Atomic Name Actinium
1.1
Lanthanum – La57
Atomic Number 57 | Atomic Symbol La | Atomic Name Lanthanum
Atomic Number 89 | Atomic Symbol Ac | Atomic Name Actinium
Atomic Number 57 | Atomic Symbol La | Atomic Name Lanthanum