Physical Science Chapter 7A

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Across
  1. 1. gas release showing evidence of chemical change
  2. 5. coefficients ___ the equation
  3. 7. formed during a chemical reaction
  4. 9. evidence of chemical change found in eggs producing hydrogen sulfide gas
  5. 10. solid forming from liquids mixing together
  6. 12. 4Fe + ___O2 🡪 2Fe2O3
  7. 13. N2 + 3H2 🡪 ___NH3
  8. 14. number placed in front of a chemical formula
Down
  1. 2. indicates the number of atoms of that element
  2. 3. chemical ____: process that rearranges the atoms in one or more substances into one or more new substances
  3. 4. releasing or absorbing energy is often found as a ____ change
  4. 6. chemical evidence of wood turning to ash is a ___ change
  5. 8. product in this equation: 2H2 + O2 🡪 2H2O
  6. 11. enters into a chemical reaction