Chemical Reactions

1234567891011
Across
  1. 4. the chemical present before a chemical reaction occurs
  2. 5. the chemicals present after a chemical reaction occurs
  3. 7. a reaction that releases heat to the surroundings
  4. 8. a reaction that absorbs heat from the surroundings
  5. 9. a shorthand that uses chemical symbols and molecular formulas to show what occurs during a chemical reaction
  6. 10. the addition of oxygen to a chemical substance
  7. 11. a natural law stating that the same amount of mass is present before and after a chemical reaction
Down
  1. 1. a type of chemical reaction that involves the combination of oxygen and fuel
  2. 2. a type of chemical reaction in which two or more substances combine and form one compound
  3. 3. a type of chemical reaction that involves one chemical compound that breaks into two or more separate compounds or elements
  4. 4. a type of chemical reaction that involves the exchange of ions in ionic compounds
  5. 6. the rearrangement of atoms by the breaking and reforming of chemical bonds