Across
- 3. reaction a chemical reaction in which a compound breaks down into two or more simpler substances
- 6. equation a representation of a chemical reaction in which the reactants and products are expressed as formulas
- 8. reaction a chemical reaction that releases energy to its surroundings
- 9. mass the mass of one mole of a substance
- 10. reaction a chemical reaction that absorbs energy from its surroundings
- 11. substances that undergo change in a chemical reaction
- 12. numbers that appear before a formula in a chemical equation to show the relative proportions of each reactant and product
Down
- 1. reaction a chemical reaction in which one element takes the place of another element in a compound
- 2. reaction a chemical reaction in which two or more substances react to form a single substance
- 3. reaction a chemical reaction in which two compounds exchange positive ions and form new compounds
- 4. an amount of a substance that contains approximately 6.02 × 1023 particles of the substance
- 5. new substances formed as a result of a chemical reaction
- 7. energy the energy stored in chemical bonds