what is name of the compound P2S5? is it phosphorous pentasulfide?

I believe I would name it diphoshorus pentasulfide. Note the correct spelling of phosphorus.

Yes, the compound P2S5 is named phosphorous pentasulfide.

Yes, the compound P2S5 is indeed called phosphorus pentasulfide. The name of a compound is determined by its chemical formula, which consists of the symbols of the elements present in the compound and the number of atoms of each element. To arrive at the name of P2S5, you can use the following steps:

1. Determine the symbols of the elements involved. In this case, "P" represents phosphorus, and "S" represents sulfur.

2. Identify the subscripts (numbers) following each element symbol. In P2S5, "2" is the subscript for phosphorus, meaning there are two phosphorus atoms, and "5" is the subscript for sulfur, indicating five sulfur atoms.

3. Now, use the prefix system to name the compound based on the number of atoms of each element. Since there are two phosphorus atoms, the prefix "di-" is used. Similarly, since there are five sulfur atoms, the prefix "penta-" is used.

4. Finally, combine the prefixes and element names to form the compound's name. In this case, the compound is named phosphorus pentasulfide.

Following these steps can help you name compounds based on their chemical formulas.