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5 Written questions

5 Matching questions

  1. Mendeleev
  2. directly
  3. isotopes
  4. alkali metals
  5. electrons
  1. a two quantities are ________ proportional to each other if dividing one by the other gives a constant value.
  2. b the elements in group 1 are known as the
  3. c the first periodic table was published by_______
  4. d London dispersion forces are the result of the movement of ___________
  5. e atoms of the same element with different masses

5 Multiple choice questions

  1. a mutual electrical attraction between the nuclei and valence electrons of different atoms that binds the atoms together
  2. the weighted average of the atomic masses of the naturally occurring isotopes
  3. ________ are available to be lost, gained, or shared in the formation of chemical compounds
  4. a specific portion of matter in a given region of space that has been selected for study during an experiment or observation.
  5. whether a bond will be ionic or covalent depends on the difference in ____________ of the atoms involved

5 True/False questions

  1. dipolecreated by equal but opposite charges that are separated by a short distance


  2. carbon-14a positively charged ion


  3. law of multiple proportionsstates that if two or more different compounds are comosed of the same two elements, then the ratio of the masses of the second element combined with a certain mass of the first element is always a ratio of small whole numbers


  4. photoelectric effectrefers to the emission of electrons from a metal when light shines on the metal


  5. enthalpy of vaporizationa charged group of covalently bonded atoms


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