Science Vocab.

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Across
  1. 2. two or more different elements chemically combined
  2. 4. a substance that cannot be broken down
  3. 5. a chemical reaction that absorbs energy
  4. 7. Bond the force that holds cations and anions together
  5. 8. Bond the chemical in which two atoms share a pair of valence electrons
  6. 10. of mass Principle that the mass of an object or collection of objects never changes
  7. 14. new substance formed as a result of a chemical reaction
  8. 15. Replacement a chemical in which one element takes the place of another element in a compound
Down
  1. 1. Reaction a chemical reaction is the process in which a substance is transformed into a new substance is transformed into a new substance
  2. 3. a chemical reaction in which a compound breaks down into two or more simpler substances
  3. 6. a chemical reaction in which two or more substances react to form a single substance
  4. 9. a substance that undergoes change is a chemical reaction
  5. 11. Reaction a process in which the structure and energy of an atomic nucleus are changed by interaction with another nucleus
  6. 12. replacement a chemical reaction in which two compounds exchange positive ions and form two new compounds
  7. 13. the force that holds atoms or ions together