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Across
  1. 1. the positive particles of an element
  2. 6. the level that an element reacts
  3. 8. releases heat
  4. 9. reaction ending with a different substance
  5. 12. the decaying of something
  6. 16. the negative particles of an element
  7. 17. when and element's charge is imbalanced
  8. 18. the parts of a reaction before the product
  9. 19. fire is formed
  10. 20. an element with an uneven number of neutrons
  11. 22. chemical compound with both changing elements
  12. 23. reaction ending with the same substance
  13. 24. the outcome of a reaction
Down
  1. 2. the neutral particles of an element
  2. 3. chemical compound with simpler reactants
  3. 4. the representation of the elements
  4. 5. Au, Ti, & Al
  5. 7. written out problem solving
  6. 10. absorbs heat
  7. 11. O, N, & He
  8. 13. a bond between nonmetals
  9. 14. chemical compound with one changing element
  10. 15. a bond between metals and nonmetals
  11. 21. how compact something is