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5 Written questions

5 Matching questions

  1. double covalent bond
  2. trace element
  3. valence electron
  4. electronegativity
  5. ionic bond
  1. a sharing two pairs of valence electrons
  2. b two ions of opposite charge
  3. c attraction of an atom for the electrons
  4. d outer electrons
  5. e those required by an organism in only minute quantities

5 Multiple choice questions

  1. holds atoms together, strongest are covalent and ionic bonds
  2. three-dimensional space where an electron is found 90% of the time
  3. different states of potential energy for electrons in an atom
  4. negatively charged ion
  5. mass of an atom

5 True/False questions

  1. compoundpositively charged ion


  2. cationnegatively charged ion


  3. valencebonding capacity, equals number of unpaired electrons in the atom's outermost shell


  4. reactantsubstance that cannot be broken down to other substances by chemical reactions


  5. radioactive isotopeatoms that have more neutrons than other atoms of the same element and therefore weigh more


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