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VALENCY 4-Tetravalent elements                   VALENCY 4-Tetravalent elements

                 Variable Valencies                             CARBIDE
                                                                  4-
                 Plumbic      [Lead [IV] ]                      C
                   4+
                 Pb
                 Stannic       [Tin  [IV] ]
                   4+
                 Sn
                                                        4+
                 Platinic       [Platinum [IV] ]             Pt
                                                        4+
                 Manganic   [Manganese [IV] ]       Mn

               Calculation of valency of ions: The valency of an ion is equal to the charge they carry
               without the positive or negative sign
                                            2+
               Example: Calcium ion= Ca  Valency = 2
                                     +
               Ammonium ion=NH 4  Valency= 1














































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