Chemistry so far

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Across
  1. 2. ___ metals = Group 1
  2. 5. Used to make shorter more useful/ in higher demand alkanes
  3. 11. Mr
  4. 13. Have the same molecular formula but different structural formula
  5. 15. Group 7
  6. 16. Particles need to ___ to react
  7. 18. 6x10 23
Down
  1. 1. Unsaturated hydrocarbons
  2. 2. CnH2n+2
  3. 3. provides an alternative pathway with a lower activation energy
  4. 4. Alkenes are useful for making ____
  5. 6. Compound made of H and C atoms only
  6. 7. the minimum energy required for a successful collision
  7. 8. Distillation used to separate crude oil
  8. 9. A series of compounds with similar chemical properties and trends in physical properties
  9. 10. Increasing ____ means more particles per unit volume
  10. 12. Elements get ___ reactive as you go down group 7
  11. 14. The ___of reaction is how fast it occurs
  12. 17. Same atomic number, different mass number