Materials: Structures & Uses Predicting Properties.

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Presentation transcript:

Materials: Structures & Uses Predicting Properties

Entry Task Work with a partner to answer Questions 1-4 on page 126 “Predicting Properties” Have Out: Atoms, Ions & Isotopes Questions Bohr Models

Unit One Quiz Retakes TODAY From 3-4pm

Electrons determine properties… Why?

Energy level “pictures”

Periodic Variation in Properties

Electron Shielding

Periodic Variation in Properties

A.13 It’s Only Money What characteristics are necessary or desirable in the material you will use for your coin For example: A high melting point is necessary Metalic luster may be desired (it’s pretty!)

A.13 It’s Only Money Record your thoughts on these questions: 1.What physical properties must the coin material have? 2.What other physical properties are desirable? 3.What chemical properties are required of the coin’s material? 4.What other chemical properties are desirable? 5.Which would make the best primary material for the new coin: a metal, a nonmetal, or a metalloid? Explain. 6.What factors are desirable coin characteristics did you consider when you answered Question 5?

Homework: Review for Unit 2 Section A Quiz by: Completing Section A Summary Questions: 1-5 (A.1-A.3) (A.6-A.11) 19, 21, 22, 24, 25 (A.8) (A.12) & making Bohr Models by hand for: H, He, Be, B, Ne, Na, Al, P, Sc,