Across
- 4. the processes that transform one substance into another
- 6. Is named after the planet Uranus
- 9. the process by which a chemical reaction is accelerated by a catalyst
- 11. atoms of the same element that have a different number of neutrons
- 14. changes the rearrangement of atoms
- 18. It is usually used as an additive in alloys
- 19. the process of a solid turning directly into a gas, without passing through a liquid phase
- 21. a reaction with metals and oxygen to produce a metal oxide.
- 24. the simplest form of a substance, can't be broken down any further
- 25. a reaction that combines, carbon dioxide and water to produce sugar and oxygen under the presence of sunlight
- 26. alloys combining different metals to create alloys
- 27. The person that discovered hydrogen was Henry Cavendish
- 28. a substance made of two or more different elements bonded together
- 29. a chemical reaction with a hydrocarbon and oxygen to produce carbon dioxide and water
Down
- 1. The process of gaining electron
- 2. the breakdown of a compound using water
- 3. The process of liquid turning into a gas
- 5. a state in which a chemical reaction is no longer proceeding
- 7. substances that release hydroxide ions in a solution
- 8. acid produces a metal salt and hydrogen
- 10. groups of atoms bonded together to form compounds
- 12. A measure of how acidic or basic a solution is
- 13. the ability of a substance to dissolve in a solven
- 15. negatively charged particles that orbit an atom's nucleus
- 16. substances that release hydrogen ions in a solution
- 17. The process of forming crystals from a solution
- 20. The basic building blocks of matter
- 21. the process of changing from a gas to a liquid
- 22. the topic this whole crossword is about
- 23. table the chart that organizes all elements by their atomic number and chemical properties