Across
- 3. the process of changing a liqiud to a solid
- 5. when water evaporates and forms a gas
- 9. a chain of molecules that repeats
- 10. the arrangements of all known elements in a single table
- 11. collision of particles when reacting
- 12. it is made of one substance
- 13. water does this at a 100 degress
- 17. changes reactants into products
- 19. a type of catalyst that we need to survive
- 20. rows in the periodic table
- 21. a gas that has a strong odour
- 22. one atom
- 23. helps speed up reaction
- 24. when two objects are joined
- 26. a close gathering of a substance
- 27. the process of gas to liquid
- 28. what you have after a reaction
Down
- 1. made by particles and is indivisible
- 2. a group of two or more atoms that are bonded
- 4. process of liquid to gas
- 5. something that becomes a gas easily
- 6. when metal is damaged due to the elements
- 7. arrangements of particles in a pattern
- 8. an element that has two or more of the same atoms bonded
- 14. a single molecule that only has two atoms
- 15. a moleculewith many different atoms bonded together
- 16. columns of elements in the periodic table
- 17. made of two ore more atoms
- 18. process when gas changes into a liqiud
- 25. what you have before a reaction