MOLECULAR COMPOUNDS
A molecular compound is a group of atoms held together by a covalent bond. Compounds made
entirely of non-metals are generally molecular compounds. Carbon tetrachloride, CCl4, is an
example of a molecular compound. When naming these compounds prefixes are used to denote
how many of each atom is bonded in the compound. However, the prefix mono- is not used with the
first element in the compound, even if there is only one element. The ending of the second element
in the compound is always changed to –ide, in the same way the ending is changed for monatomic
anions.
Write a correct formula for each of the following:
1. __________________ dinitrogen trioxide
5. ____________________ diarsenic trioxide
2. _____________________ sulfur dioxide
6. ____________________ dinitrogen oxide
3. ____________________ carbon disulfide
7. ______________________ carbon dioxide
4. ______________________ sulfur trioxide
8. _____________ diphosphorus pentoxide
9. ____________________ nitrogen dioxide
15. ____________________ silicon tetrachloride
10. _____________________ sulfur trioxide
16. ______________________ silicon dioxide
11. ____________ tetraphosphorus decoxide
17. ______________________ sulfur trioxide
12. ______________________ oxygen diflouride
18. _____________________ sulfur tetrafluoride
13. ____________________ diarsenic pentoxide
19. ___________________ carbon tetrachloride
14. ___________________ dichlorine tetraoxide
20. _____________________ sulfur hexaiodide
Write the NAME of each of the following molecular and organic compounds.
21. _____________________________ PCl5
26. _____________________________ XeF2
22. _____________________________ SF4
27. _____________________________ SF6
23. _____________________________ ClF3
28. _____________________________ XeF4
24. _____________________________ CO
29. _____________________________ SO3
25. _____________________________ SO2
30. _____________________________ N2O5