Chemistry Jan. 11 & 12, 2017

•OBJECTIVE: Students will describe and explain orally and in writing, how to determine the degree of polarity in a covalent bond.

•W.O.D. Circumspect-cautious

•WARM-UP

1.Explain the difference between an atom, an ion, and a molecule. Give an example to illustrate your answer.

2.Define the following terms: bond dissociation energy, nonpolar covalent bond, polar covalent bond

CW-making notes

1.Bond dissociation energy (8.2)

what is it used for? In what units is bond dissociation energy measured in? What is the bond dissociation for each of the following bonds: C—H, C—O, N—N, C—N. Arrange the bonds above from weakest to strongest

2. Bond polarity (8.4)  What is nonpolar covalent bond? Give an example. What is a polar covalent bond? Give an example. What is electronegativity differences used for? Complete Page 249 #29 & 30