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5 Written questions

5 Multiple choice questions

  1. units used to measure the mass of atoms; defin ed as 1/12 the mass of carbon-12
  2. elements of group 8A; have 8 valence electrons (exception is He) and are inert
  3. an arrangement of elements in columns, ordered according to atomic numbers
  4. elements that form a bridge between the elements on the left and right sides of the periodic table
  5. elements of group 7A; have 7 valence electrons and are highly reactive

5 True/False questions

  1. alkaline earth metalselements of group 2A; have 2 valence electrons and are reactive


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


  3. metalselements that are good conductors of heat and electricity


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


  5. periodthe vertical columns of the periodic table of the elements


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