Naming Covalent Compounds

1
Naming Covalent Compounds
2
Writing Covalent Compounds

• Made of two anions (2 nonmetals or 1 nonmetal 1
  polyatomic ion)
• Identify the less electronegative element 1st
  (trend less EN is the one farthest left
  farthest down on Periodic Table)
• The 1st nonmetal is just given the name as found
  on the Periodic Table (just like ionic)
• The 2nd nonmetal ending is changed to ide (just
  like ionicdont change polyatomics)
• Difference numerical prefixes are used to
  express how many of each nonmetal are present

3
Writing Covalent Compounds (cont.)

• You never use criss-cross method
• The only time you do not use a prefix is when
  there is only one of the first nonmetal.

4
Covalent Compound Practice

• SO2
• N2O
• NO2
• CCl4
• Cl2O7
• PCl3
• SF6
• Si3N4
• N(BrO3)5
• H2O

• Sulfur Dioxide
• Dinitrogen Monoxide
• Nitrogen Dioxide
• Carbon Tetrachloride
• Dichlorine Heptaoxide
• Phosphorus Trichloride
• Sulfur Hexaflouride
• Trisilicon Tetranitride
• Nitrogen Pentabromate
• Water ? - can use common name

5
Covalent Compound Practice

• Phosphorus Trioxide
• Dinitrogen Pentacarbide
• Tellurium Noniodide
• Carbon Monoxide
• Selenium Heptaflouride
• Tetraphosphorous Decoxide
• Arsenic Hexabromide
• Silicon Dichloride

• PO3
• N2C5
• TeI9
• CO
• SeF7
• P4O10
• AsBr6
• SiCl2