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5 Written questions

5 Matching questions

  1. hydrogen bond
  2. molecule
  3. electronegativity
  4. molecular formula
  5. isotope
  1. a further abbreviated formula
  2. b two or more atoms held together by covalent bonds
  3. c hydrogen atom covalently bonded to one electronegative atom is also attraced to another electronegative atom
  4. d atoms that have more neutrons than other atoms of the same element and therefore weigh more
  5. e attraction of an atom for the electrons

5 Multiple choice questions

  1. point at which reactions offset one another exactly, no effect on concentrations of reactants and products
  2. one in which the nucleus decays spontaneously, giving off particles and energy
  3. substance that cannot be broken down to other substances by chemical reactions
  4. number of protons
  5. substance consisting of two or more elements combined in a fixed ratio

5 True/False questions

  1. matteranything that has mass and takes up space


  2. covalent bondsharing of a pair of valence electrons by two atoms


  3. nonpolar covalent bondone atom is more electronegative than another


  4. anionpositively charged ion


  5. energy leveldifferent states of potential energy for electrons in an atom