Topic: Periodic Trends

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Across
  1. 2. Rows in a periodic table
  2. 3. Positive charge
  3. 4. Columns in a periodic table
  4. 7. Substance undergoes chemical reactions
  5. 8. Negative charge
  6. 10. the structure in a cell that contains the chromosomes.
Down
  1. 1. is the ability of an atom in a molecule to attract shared electrons
  2. 5. Measure of the size of an atom
  3. 6. They determine the characteristics of elements
  4. 9. Amount of energy required to remove an electron from an atom