Tin (IV) Oxide or Stannic Oxide
Oxygen has an oxidation number of -2.
In this equation, the total charge on oxygen would be -4 because there are two of them.
The tin would have to have a +4 charge to balance the charges to a sum of zero.
The stock name is Tin (IV) Oxide.
The old name is Stannic Oxide.
The latin root for tin is stann-
The -ic ending is for the higher oxidation number,
If it were the lower oxidation number on tin,