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III. Section 3 Nonmetals and Metalloids

This section explores the characteristics of nonmetals and metalloids, highlighting their distinct properties compared to metals. Nonmetals, typically found as gases at room temperature, are characterized by dullness, brittleness, and poor conductivity. They form various compounds, with the noble gases in Group 18 being particularly inert. The text also describes nonmetal families, such as the carbon, nitrogen, oxygen, and halogen families. Additionally, metalloids exhibit a mix of properties from both metals and nonmetals, functioning as semiconductors under specific conditions.

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III. Section 3 Nonmetals and Metalloids

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  1. III. Section 3 Nonmetals and Metalloids

  2. A. What is a nonmetal? Lack properties of metals 17 on PT Many gases at room temperature Dull Brittle Poor conductors

  3. 7. Form compounds 8. Group 18 do not make compounds 9. Diatomic molecules- two identical atoms (O2)

  4. B. Families of Nonmetals Carbon family- Group 14- 4 valence electrons Nitrogen family- Group 15- 5 valence electrons Oxygen family- Group 16- 6 valence electrons Oxygen can combine with most elements Halogen Family- Group 17- 7 valence electrons Noble gases- Group 18- do not gain or loose valence electrons Hydrogen- simplest element- not grouped

  5. C. The Metalloids Seven elements some characteristics of metals and nonmetals Ability to conduct electricity Semiconductors- some conditions can carry electricity

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