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Chapter 6 Notes part III

Chapter 6 Notes part III. Covalent Compounds. Covalent (Molecular) Compounds. So far, we have only talked about ionic compounds; compounds made of a metal and nonmetal. Covalent (Molecular) Compounds. A covalent compound forms between two nonmetals.

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Chapter 6 Notes part III

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  1. Chapter 6 Notes part III Covalent Compounds

  2. Covalent (Molecular) Compounds So far, we have only talked about ionic compounds; compounds made of a metal and nonmetal.

  3. Covalent (Molecular) Compounds A covalent compound forms between two nonmetals. These compounds occur because the nonmetals will share electrons to have a full last energy level.

  4. Covalent (Molecular) Compounds Since electrons are not lost or gained, the atoms are not considered ions, so they do not have a charge.

  5. Naming Covalents Because covalent compounds aren’t made of ions, you can’t use the oxidation number to predict how many atoms of each element are going to be in a covalent compound.

  6. Naming Covalents The following prefixes will be used. mono- one hexa- six di- two hepta- seven tri- three octa- eight tetra- four nona- nine penta- five deca- ten

  7. Naming Covalents • Name the first element in the compound, and use a prefix if there is more than one of the element. EX: CO2 EX: CO carbon carbon

  8. Naming Covalents • Name the second element, end in –ide, and put a prefix at the beginning even if there is only one. EX: CO EX: CO 2 carbon di oxide “understood one” carbon mon oxide 1

  9. Naming Covalents EX: N O 2 5 Di nitrogen pent oxide

  10. Name These: Sulfur dioxide • SO2 • NO • Cl2S • BCl3 • P2S7 Nitrogen monoxide Dichlorine monosulfide Boron trichloride Diphosphorus heptasulfide

  11. Writing Molecular Formulas 1) Write the symbol for the 1st element and use the prefix to determine the subscript. EX: Di Di nitrogen nitrogen penta penta sulfide sulfide sulfide N 2

  12. Writing Molecular Formulas 2) Write the symbol for the 2nd element and use the prefix to determine the subscript. EX: Di Di nitrogen nitrogen penta penta sulfide sulfide sulfide N S 2 5

  13. Name These: CCl4 • Carbon tetrachloride • Dinitrogen heptoxide • Carbon monoxide • Dichlorine monoxide • Trisilicon decaoxide N2O7 CO Cl2O Si3O10

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