Chemistry Chapter 1 Lesson 3 Powerpoint 3

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Elements are pure substances that can not be decomposed by chemical changes. The elements serve as the building blocks of matter. Each element has characteristic properties. This organization of elements is the periodic table.

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Chemistry Chapter 1 Lesson 3 Powerpoint 3

  1. 1. Section 3 Elements Chapter 1Preview• Objectives• Introduction to the Periodic Table• Types of Elements
  2. 2. Section 3 Elements Chapter 1Objectives• Use a periodic table to name elements, given their symbols.• Use a periodic table to write the symbols of elements, given their names.• Describe the arrangement of the periodic table.• List the characteristics that distinguish metals, nonmetals, and metalloids.
  3. 3. Section 3 Elements Chapter 1Introduction to the Periodic Table
  4. 4. Section 3 Elements Chapter 1Regions of the Periodic Table
  5. 5. Section 3 Elements Chapter 1Introduction to the Periodic Table• The vertical columns of the periodic table are called groups, or families. • Each group contains elements with similar chemical properties.• The horizontal rows of elements in the periodic table are called periods. • Physical and chemical properties change somewhat regularly across a period.
  6. 6. Section 3 Elements Chapter 1Types of Elements Metals• A metal is an element that is a good electrical conductor and a good heat conductor. • 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
  7. 7. Section 3 Elements Chapter 1Types of Elements• Gold, copper, and aluminum are metals
  8. 8. Section 3 Elements Chapter 1Types of ElementsNonmetals• A nonmetal is an element that is a poor conductor of heat and electricity. • Properties of nonmetals • many are gases • solids are brittle • poor conductors of heat and electricity
  9. 9. Section 3 Elements Chapter 1Types of Elements• Various nonmetal elements(a) carbon, (b) sulfur, (c) phosphorus, and (d) iodine
  10. 10. Section 3 Elements Chapter 1Types of ElementsMetalloids• 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
  11. 11. Section 3 Elements Chapter 1Types of ElementsNoble Gases • elements in Group 18 of the periodic table • generally unreactive • gases at room temperature

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