WHAT DO U MEAN BY CHEMICALLY SIMILAR?

chemically similar are those elements which are chemicall same i.e they posses similar chemical properties but their physical properties differ.

Hope this helps you !!!!! @

LIK...DIAMOND  N GRAPHITE..DIAMOND  IS  THE  HARDEST  NTURAL  SUBSTANC  NOWN..N  GRAPHITE  IZ  SLPPERY....BUT  STILL BOTH ARE  THE  ALLOTROPES OF CARBON..WID  SAME  CHEMICAL  PROPERTIES  AS  THEY  CONSIST OF SAME ELEMENT....IE.  CRBON..:)