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On Target? Do this on your Warm Up worksheet!

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Presentation on theme: "On Target? Do this on your Warm Up worksheet!"— Presentation transcript:

1 On Target? Do this on your Warm Up worksheet!
No warm-up today! Get out your lab notebook, create the following table in your lab notebook and try to fill it in with your group using the table on pg. 133! REMINDER: QUIZ ON THURSDAY!!!

2 Electronegativity scale
3.3 Electronegativity difference <0.4 0-0.4 >2.1 Type of bond Nonpolar Covalent Polar Covalent Ionic Diagram Electrons? Shared Equally Shared Unequally Transferred Examples Oxygen molecule (O2) Water (H2O) Table Salt (NaCl)

3 For today Warmup Review book questions from yesterday Electronegativity table Electronegativity Practice Objective: I can differentiate between different types of bonds by calculating electronegativity difference.

4 Why are there different types of Bonds?
Electronegativity: ability to pull electrons Like a tug-of-war. If they are equally matched, they share the electrons equally. If one is way stronger, it can pull electrons away from another atom.

5 Answers from yesterday’s book questions (Write in your lab notebook!)
Why don’t some atoms share their electrons equally? Some atoms don’t share their electrons equally because some atoms are better than others at attracting electrons!

6 Answers from yesterday’s book questions (Write answers in your lab notebook!)
How is electronegativity like a tug-of-war? If atoms have the same strength (electronegativity), they tie (share the electrons equally). This is a covalent bond. If the atoms are different in strength (electronegativity), one atom pulls the rope more (share the electrons unequally). This is a polar covalent bond.

7 Answers from yesterday’s book questions (Write answers in your lab notebook!)
How are covalent and polar covalent bonds similar and different? Similar: Both share electrons! Different: Polar covalent bonds share electrons unevenly, covalent bonds share electrons evenly.

8 Answers from yesterday’s book questions (Write answers in your lab notebook!)
What type(s) of bonds are described by the term molecule? Why? Covalent (and polar covalent!) bonds are described by the term molecule. Ionic bonds are called ionic compounds, since there are no individuals molecules in an ionic crystal.

9 Electronegativity scale
Electronegativity differences have some grey areas…. This table is a tool that will help you understand the electronegativity scale 3.3 Electronegativity difference Type of bond Diagram Electrons? Examples of Compounds

10 Electronegativity scale
3.3 Electronegativity difference <0.4 0-0.4 >2.1 Type of bond Nonpolar Covalent Polar Covalent Ionic Diagram Electrons? Shared Equally Shared Unequally Transferred Examples Oxygen molecule (O2) Water (H2O) Table Salt (NaCl)

11 Electronegativity practice
Make a diagram to show how each pair of atoms listed below shares or transfers electrons, and determine what type of bond they have. A. Hydrogen-oxygen in water (H2O) B. Carbon-oxygen in carbon dioxide (CO2) C. Potassium-flourine in potassium fluoride (KF) D. Carbon-hydrogen in methane (CH4) E. Bromine-bromine in bromine (Br2)

12 On Pg 127

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