mendeleev table - lanthanides

atom atomic background beaker blocks cerium chart chemical chemistry class color compare configuration different dysprosium education electronegative electrons element erbium europium frame full gadolinium gas graphic groups holmium illustration isolated lab lavoisier lutetium mass mendeleev molecule nature neodymium nuclear number order periodic periods physics praseodymium promethium research row samarium school science scientific script shot signs symbols systematize table teach technique technology terbium text thulium typescript valence vector weight ytterbium