Binary Molecular compounds

1. Binary Molecular compounds

2. How to identify them • As the name might suggest (BInary), these compounds contain exactly two elements. • In this class both of these elements will be non-metals. • If a compound is made of exactly two elements and both of them are non-metallic you will use the skills you learn today to name the compound.

3. Examples • Names of binary molecular compounds are NOT to be memorized. They must be figured out. • NO2 is called nitrogen dioxide. • P2O5 is called dinitrogenpentoxide. • SO3 is called sulfur trioxide. • Today I will teach you to name these compounds. • NOTE: All are made up of exactly two non-metallic elements.

4. Prefix system • Look right. You will want to copy this chart down. • These prefix indicate the number of each atom present in a compound. • Rule 1: If the first element has only one atom it receives no prefix.

5. Prefix system • Rule 2: The second atom ALWAYS gets a prefix, even if there’s only one. • CO is called carbon monoxide. • Rule 3: The second atom ALWAYS ends in “ide”.

6. Prefix system • Here’s an example problem: • Name: Sulfur hexafluoride • Symbol SF6

7. Prefix system • Here’s another example problem: • Name: Tetraphosphorousdecoxide • Symbol P4O10

8. Prefix system • Here, you try one • Name: Carbon tetrafluoride • Symbol ?????

9. Prefix system • Here, you try one • Name: Carbon tetrafluoride • Symbol CF4

10. Prefix system • Try another one: • Name: ??? • Symbol PCl5

11. Prefix system • Try another one: • Name: Phosphorus pentachloride • Symbol PCl5

12. Prefix system • One last one: • Name: ?????? • Symbol N2O

13. Prefix system • One last one: • Name: Dinitrogen monoxide • Symbol N2O