Chapter 12 The Periodic Table - Materialteknologi

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Metalloids or Semimetals• Properties of both• Semiconductors
Properties of MetalloidsMetalloids straddlethe border betweenmetals and nonmetalson the periodictable. <strong>The</strong>y have properties of both metals andnonmetals.Metalloids are more brittle than metals, lessbrittle than most nonmetallic solids Metalloids are semiconductors of electricity Some metalloids possess metallic luster
Page 2 and 3: History• Russian scientist Dmitri
Page 4 and 5: Mendeleev’s s Table• Grouped el
Page 6 and 7: The Periodic TableGroup orfamilyPer
Page 8 and 9: • Elements are placed in columns
Page 10 and 11: The group B are called thetransitio
Page 12 and 13: Alkali Metals• Very reactive• N
Page 14 and 15: • Group 7A is called the Halogens
Page 16 and 17: Noble Gases• Do not react• Will
Page 18 and 19: Metals
Page 20 and 21: Examples of MetalsPotassium, Kreact
Page 22 and 23: Properties of Nonmetals…Carbon, t
Page 26: Silicon, Si - A MetalloidOther meta

Chapter 12 The Periodic Table - Materialteknologi

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