1. 1.2: Matter and Its Properties Chemistry

2. Announcements Quiz Wednesday over 1.1 – and what we get to today. Review questions

3. Goals 1. Distinguish between the physical properties and chemical properties of matter. 2. Classify changes of matter as physical or chemical. 3. Explain the gas, liquid, and solid states in terms of particles. 4. Explain how the law of conservation of energy applies to changes of matter. 5. Distinguish between a mixture and a pure substance.

4. Matter Matter is anything that has… 1. and 2.

5. The building blocks of matter Atoms are the building blocks of matter.

6. Properties are Characteristics Extensive – Depend on amount of matter Intensive – Do not depend on amount of matter

7. Physical Property Physical Change Chemical Property Chemical Change

8. Chemical Reactions CO 2 + H 2 O  C 6 H 12 O 6 + O 2

9. Changes of state Physical changes http://phet.colorado.edu/en/simulation/stat es-of-matterhttp://phet.colorado.edu/en/simulation/stat es-of-matter

10. Comparison of Physical and Chemical Properties

11. Classification of Matter

12. Classifying Matter

13. Examples of Mixtures

14. Lab Chemicals and Purity

15. Objectives 1. Use a periodic table to name elements, given their symbols. 2. Use a periodic table to write the symbols of elements, given their names. 3. Describe the arrangement of the periodic table. 4. List the characteristics that distinguish metals, nonmetals, and metalloids. Section 3 Elements Chapter 1

16. Introduction to the Periodic Table Section 3 Elements Chapter 1

17. Section 3 Elements Chapter 1 Regions of the Periodic Table

18. Types of Elements Metals Properties of metals most are solids at room temperature malleable - they can be hammered or rolled into thin sheets ductile - they can be drawn into a fine wire conduct electricity and heat well Section 3 Elements Chapter 1

19. Nonmetals Properties of nonmetals many are gases solids are brittle poor conductors of heat and electricity Section 3 Elements Chapter 1 Various nonmetal elements (a) carbon, (b) sulfur, (c) phosphorus, and (d) iodine

20. Metalloids A metalloid is an element that has some characteristics of metals and some characteristics of nonmetals. Properties of metalloids all metalloids are solids at room temperature semiconductors of electricity Section 3 Elements Chapter 1 Why use metalloids instead of metal?

21. Types of Elements Noble Gases elements in Group 18 of the periodic table generally unreactive gases at room temperature Section 3 Elements Chapter 1