Crossword Puzzle Naming Covalent CompoundsOnline version Fill in the crossword with the correct covalent names. by Devon Heath 1 P4S3 2 N2F4 3 P2O5 4 SiCl4 5 N2O3 6 CBr4 7 B2O3 8 SO2 9 CO2 10 The prefix used to denote 4. 11 The prefix used to denote 5. 12 The prefix used to denote 1. 13 The prefix used to denote 6. 14 The prefix used to denote 3. 15 The prefix used to denote 2. 2 10 9 5 3 6 7 1 4 14 12 13 15 11 8