Periodic System for Chemists

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Lanthanides

Rare earth metals with atomic numbers 57-71. Soft, silvery metals with high magnetic susceptibility.

Discovery Period: 18th to 20th century (1787-1947)

Characteristics

  • • Similar chemical properties
  • • Silvery-white metals
  • • High magnetic susceptibility
  • • Form +3 ions typically
  • • Used in magnets and electronics
  • • Difficult to separate from each other

Elements (14)

57
La
Lanthanum
58
Ce
Cerium
59
Pr
Praseodymium
60
Nd
Neodymium
61
Pm
Promethium
62
Sm
Samarium
63
Eu
Europium
64
Gd
Gadolinium
65
Tb
Terbium
66
Dy
Dysprosium
67
Ho
Holmium
68
Er
Erbium
69
Tm
Thulium
70
Yb
Ytterbium

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