Science Crossword

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Across
  1. 4. the average weight of an atom of an element
  2. 6. a vertical row or list of elements on the periodic table
  3. 7. an electrically charged atom or group of atoms formed by the loss or gain of one or more electrons
  4. 8. a substance that loses electrons becomes...
  5. 9. a table illustrating the periodic system, in which the chemical elements, formerly arranged in the order of their atomic weights and now according to their atomic numbers, are shown in related groups.
  6. 10. any of the group of univalent metals including potassium, sodium, lithium, rubidium, cesium, and francium
Down
  1. 1. A substance that gains electrons becomes...
  2. 2. a particle smaller than an atom
  3. 3. a horizontal line of elements on the periodic table
  4. 5. any of two or more forms of a chemical element