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+: cobalt(ii) ion; co3+: cobaltous ion d. pb2+: lead ion; pb4+: lead(iv) 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.

The answer to this is the 3rd choice!