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5 Written Questions

5 Matching Questions

  1. isotope
  2. covalent bond
  3. molecular formula
  4. van der Waals interaction
  5. structural formula
  1. a further abbreviated formula
  2. b represents both atoms and bonding
  3. c atoms that have more neutrons than other atoms of the same element and therefore weigh more
  4. d weak and occur only when atoms and molecules are very close together
  5. e sharing of a pair of valence electrons by two atoms

5 Multiple Choice Questions

  1. those required by an organism in only minute quantities
  2. one atom is more electronegative than another
  3. two or more atoms held together by covalent bonds
  4. holds atoms together, strongest are covalent and ionic bonds
  5. negatively charged ion

5 True/False Questions

  1. hydrogen bondhydrogen atom covalently bonded to one electronegative atom is also attraced to another electronegative atom

          

  2. nonpolar covalent bondone atom is more electronegative than another

          

  3. atomnegatively charged ion

          

  4. chemical equillibriumholds atoms together, strongest are covalent and ionic bonds

          

  5. mass numbersum of protons plus neutrons in nucleus

          

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