In which of the following are the symbol and name for the ion given correctly? A. Fe2+: ferrous ion; Fe3+: ferric ion B. Sn2+: stannic ion; Sn4+: stannous ion C. Co2+: cobaltII ion; Co3+: cobaltous ion D. Pb2+: lead ion; Pb4+: leadIV ion

Fe2+:ferrous  ion;  fe3+ ferric  ion  are the  one  which  are  correctly  named(Answer  A)  Sn2+  are  called  stannous  ion   while Sn4+  are  known  as stannic  ions. Pb2+  are  called  lead  (II)  ions   while  Pb4+  are  known  as lead  (IV) ion Co2+  are known was  cobalt  (II)  ions  while  Co3+  are  known  as cobalt(IIi)  ion.