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5 Written questions

5 Multiple choice questions

  1. elements of group 8A; have 8 valence electrons (exception is He) and are inert
  2. an arrangement of elements in columns, ordered according to atomic numbers
  3. elements of group 1A; have 1 valence electron and are highly reactive
  4. units used to measure the mass of atoms; defin ed as 1/12 the mass of carbon-12
  5. elements of group 2A; have 2 valence electrons and are reactive

5 True/False questions

  1. Variation across a periodFrom left to right, the elements become less metallic and more nonmetallic in their properties.

          

  2. nonmetalselements that are good conductors of heat and electricity

          

  3. groupthe horizontal rows of the periodic table of the elements

          

  4. metalselements that are poor conductors of heat and electricity

          

  5. halogenselements of group 7A; have 7 valence electrons and are highly reactive

          

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