1.2: Matter and Its Properties Chemistry

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

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.

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

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

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

Physical Property Physical Change Chemical Property Chemical Change

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

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

Comparison of Physical and Chemical Properties

Classification of Matter

Classifying Matter

Examples of Mixtures

Lab Chemicals and Purity

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

Introduction to the Periodic Table Section 3 Elements Chapter 1

Section 3 Elements Chapter 1 Regions of the Periodic Table

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

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

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?

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