Presentation on theme: "Lesson 3: Aim and Objectives"— Presentation transcript:
1Lesson 3: Aim and Objectives Aim: How can covalent bonds and covalent compounds be described?Objectives:Understand the difference between network solids and molecular substancesKnow how to determine if a bond is polar or nonpolarKnow how to describe a single, double or triple bond.
3Covalent BondsWhen two atoms make a covalent bond, 1 electron is provided for sharing by each atom. So each bond has two atoms.The number of bonds made by an atom equals the number of electrons that atom needs to make an octet.Covalent bonds can be single, double or triple.In single bonds, 1 pair of electrons are shared.In double bonds, 2 pairs of electrons are shared.In triple bonds , 3 pair of electrons are shared.Carbon is unique in that it can form single, double or triple bonds with other carbons.
4How many covalent bonds would these atoms have to make to reach an octet (stable electron configuration)?a) C d) F g) Clb) N e) S h) Nec) O f) P i) HHow many bonds would the following make with another atom of its kind?H with H O with O N with N
5Covalent Bonds Covalent bonds can be polar or nonpolar. In nonpolar covalent bonds: electrons are shared equally.In polar covalent bonds: electrons are shared unequally.
6Which of the following are polar bonds? How do you know? H-H d) O=OH-Br e) C-Oc) C-Cl f) N-H
7Complete this Concept Map Types of BondsMetallicPolarSingleMolecular
8Homework 3Draw Lewis Dot Structures for the elements in Period 5 in Groups 1, 2, 13, 14, 15, 16, 17, 18. Read pages for information on how to do this.Objective:Learn to draw Lewis Dot structures for elements.