Chemistry

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Across
  1. 4. what alcohol is used for Perfumes
  2. 5. how to extract metals of high reactivity
  3. 6. what are the differences between alkenes and alkanes
  4. 7. What consists of 78% of the atmosphere
  5. 8. what is the last element on the periodic table
Down
  1. 1. Plastics that soften when heated
  2. 2. how to measure the acidity of something
  3. 3. What is the most reactive metal