Answer: Tetrasulfur pentoxide
Explanation: S is sulfur on the periodic table and O is oxygen on the periodic table. We use those two elements as our root words.
Since both elements are non-metals we name them using prefixes. The prefix for 4 is tetra- and the prefix for 5 is penta-.
So now we have Tetra sulfur pentoxygen, the last step is to -ide the second element which is where we get the answer Tetrasulfur pentoxide.
