chemical reactions

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Across
  1. 2. releases energy that releases a lot of heat
  2. 4. substance burns in the presence of oxygen
  3. 5. lack of fluid in the body
  4. 6. formed when a chemical reaction happens
  5. 7. one element is substituted for another element in a compound
  6. 9. symbolic representations of reactions
  7. 10. combination of elements so as to form a whole
Down
  1. 1. two or more atoms connected by chemical bonds
  2. 2. absorbs energy and heat from the surroundings
  3. 3. the substances which participate
  4. 8. a molecular rearrangement
  5. 9. speeds up reaction without being consumed during the reaction