Chemistry Crossword

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Across
  1. 4. A substance that accepts protons or donates hydroxide ions (OH⁻).
  2. 6. A substance that speeds up a chemical reaction without being consumed.
  3. 7. An atom or molecule with a net electric charge due to loss or gain of electrons.
  4. 9. The SI unit for measuring the amount of substance.
  5. 10. A substance that donates protons (H⁺) in a chemical reaction.
Down
  1. 1. A state of matter with no fixed shape or volume.
  2. 2. A substance that takes part in and undergoes change during a chemical reaction.
  3. 3. A mixture of two or more metals.
  4. 5. An atom with the same number of protons but a different number of neutrons.
  5. 8. The force that holds atoms together in a molecule.