1. Naming Covalent Compounds When it is all NONMETALS

2.  A Compound is any substance composed of two or more DIFFERENT elements.  A Molecule is any substance composed of two or more atoms COVALENTLY BONDED. Compounds vs Molecules

3.  Generally Low Melting and Boiling Points  Generally Soft and Flexible  Tend to be Flammable  Don’t conduct electricity  Normally won’t dissolve in water Properties of Covalent Compounds

4. Formed between two nonmetals in 14, 15, 16, and 17 Nonmetals have high electronegativity values Electrons are shared single bond shares one pair electrons double bond shares two pairs electrons triple bond shares three pairs electrons Types of Covalent Bonds

5. Gases that exist as diatomic molecules are H 2, F 2, N 2, O 2, Cl 2, Br 2, I 2  They are simply given their elements name.  Exist this way only when not in compounds Diatomic Elements

6. Use the name of the element to name the following diatomic molecules. H 2 hydrogen N 2 nitrogen Cl 2 _______________ O 2 _______________ I 2 _______________ Learning Check

7. Two nonmetals Name each element End the last element in -ide Add prefixes to show more than 1 atom Prefixes mono1 hexa6 di2hepta7 tri3octa8 tetra4nona9 penta5deca10 Naming Covalent Compounds

8. Fill in the blanks to complete the following names of covalent compounds. CO carbon ______oxide CO 2 carbon _______________ PCl 3 phosphorus _______chloride CCl 4 carbon ________chloride N 2 O_____nitrogen _____oxide Learning check

9. A.P 2 O 5 1) phosphorus oxide 2) phosphorus pentoxide 3) diphosphorus pentoxide B.Cl 2 O 7 1) dichlorine heptoxide 2) dichlorine oxide 3) chlorine heptoxide C. Cl 2 1) chlorine 2) dichlorine 3) dichloride Learning Check