Acids and bases

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Across
  1. 4. /7ph
  2. 6. /electrical charge
  3. 7. Flying mammal
  4. 8. Has a trunk
  5. 10. Man's best friend
Down
  1. 1. /9 a or an
  2. 2. /3 a or an
  3. 3. Large marsupial
  4. 5. Likes to chase mice
  5. 9. /scale scale