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III. Section 3 Nonmetals and Metalloids

III. Section 3 Nonmetals and Metalloids. A. What is a nonmetal? . Lack properties of metals 17 on PT Many gases at room temperature Dull Brittle Poor conductors. 7. Form compounds 8. Group 18 do not make compounds 9. Diatomic molecules- two identical atoms (O2). B. Families of Nonmetals.

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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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