Wymien wszystkie Manganowce, Berylowce, Lantanowce.

Manganowce: mangan (Mn), technet (Tc), ren (Re), bohr (Bh) Lantanowce: lantan (La), cer (Ce), prazeodym (Pr), neodym (Nd), promet (Pm), samar (Sm), europ (Eu), gadolin (Gd), terb (Tb), dysproz (Dy), holm (Ho), erb (Er), tul (Tm), iterb (Yb), lutet (Lu) Berylowce: beryl (Be), magnez (Mg), wapń (Ca), stront (Sr), bar (Ba), rad (Ra)