The Atom and Nuclear Chemistry

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Across
  1. 5. a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
  2. 7. the quality of being reactive or the degree to which something is reactive.
  3. 11. bubbles in a liquid; fizz.
  4. 12. a subatomic particle with a positive electric charge.
  5. 13. any of the elements occupying group VIIA (17) of the periodic table.
Down
  1. 1. relating to the periodic table of the elements.
  2. 2. cause (a substance) to be deposited in solid form from a solution.
  3. 3. the combining power of an element.
  4. 4. the positively charged central core of an atom and containing nearly all its mass.
  5. 6. undergo or cause to undergo a process or period of transition.
  6. 8. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.
  7. 9. a set of elements occupying a horizontal row in the periodic table.
  8. 10. a set of elements occupying a column in the periodic table.