Metallic Bonding, Lewis Structures, Mixed Ionic and Covalent Bond

Practice

• Objective– Today I will be able to:

• Explain the movement of electrons in metallic bonds• Draw Lewis Structures to represent the valance electrons in an atom• Correctly name and write formulas for ionic and covalent compounds

• Evaluation/ Assessment– Informal assessment – Listening to group interactions as they

complete the ionic and covalent Lewis structure practice and the naming compounds practice.

– Formal Assessment – Analyzing student responses to the lab questions and the naming ionic and covalent compounds practice.

• Common Core Connection– Build Strong Content Knowledge– Reason abstractly and quantitatively – Look for and express regularity in repeated reasoning

Lesson Sequence• Warm – Up• Explain: Metallic Bonding• Explain: Lewis Structure Notes• Elaborate: Illustrating Ionic/Covalent Compounds with Lewis

Structures Practice– Formal assessment

• Elaborate: Ionic and Covalent Mixed Practice• Formal assessment

• Evaluate: Exit Ticket• Formal assessment

Warm - Up

• Name the following compounds:– NO2

– Al2O3

– NCl3

– KCl

Objective

• Today I will be able to:– Explain the movement of electrons in metallic

bonds– Draw Lewis Structures to represent the valance

electrons in an atom– Correctly name and write formulas for ionic and

covalent compounds

Homework

• Finish Mixed Practice Worksheet• Wear Closed Toe Shoes Tomorrow!• Bonding Mini – Exam on Thursday– More details to come

Agenda• Warm – Up• Pass out Study Guide• Metallic Bonding and Lewis Structure Notes• Lewis Structure Practice• Ionic and Covalent Naming Mixed Practice• Exit Ticket

Metallic Bonding Notes

Metallic Bonds

• Loosely bound valance electrons which are called mobile electrons because they are free to move around– delocalized

• Allow the transition metals and rare earth metals to have multiple charges

Electron Movement in Metallic Bonds

Properties of Metallic Bonds

• Solids at room temperature (except Mercury)• Ductile• Malleable • Good conductors

Drawing Lewis Structures

Lewis Structures

• Visual representation of the number of valance electrons in an atom

How to draw Lewis structures

• Write the symbol of the element• Pretend there are 4 sides• Use dots to represent the valance electrons

around the symbol• Place one dot on each side of the element

before you form pairs• Exception: If there are only 2 valance

electrons, they both go on the same side

Lewis Structures

• C 1s2 2s2 2p2

C•••

•

Lewis Structures

• Examples

Mg 1s2 2s2 2p6 3s2

Mg••

Lewis Structures

• Cl 1s2 2s2 2p6 3s2 3p5

Cl•

•• ••

••

Lewis Structures

Cl 1s2 2s2 2p6 3s2 3p5

Cl-1 1s2 2s2 2p6 3s2 3p6

Cl•

•• •••••

[ ]-1

Illustrate Ionic and Covalent Bonds with Lewis Structures

Complete the worksheet using the examples. Ask Ms. Ose if you need help with questions.

Ionic and Covalent Compounds Practice

Complete the practice with the people around you. Whatever you do not finish in class will become homework. We will

review next class.

Exit Ticket

• Draw Lewis Structures for the following elements:– F– Al– He– C– F-1