Across
- 3. This is made up of only one type of matter
- 8. Pure substances formed as a result of the attraction between between particles of the opposite charge.
- 11. A gas changes directly to a solid this is called…
- 13. A substance that can be pounded and rolled into sheets is…
- 16. Describes how a substance reacts with another substance(such as acid)
- 18. A material that cannot be broken down into a simpler form(hint:Periodic table)
- 19. A slow chemical reaction where oxygen in the air reacts with a metal
- 20. Workplace Hazardous Information System
- 23. This describes which element and how much of each are in a compound
- 25. group 2 of the elements in the periodic table,their reactivity is not as strong as the alkali metals.
- 26. A solid changes directly to a gas this is called…
Down
- 1. The materials at the start of a reaction.
- 2. The new material produced by the reaction.
- 3. The change that occurs when a material changes from one state to another.
- 4. The most reactive non-metals
- 5. Characteristics used to describe a substance(physical and chemical).
- 6. This chemical reaction occurs when oxygen reacts with a substance to form a new substance that gives off lots of energy(hint:explosion)
- 7. The most stable and unreactive gases
- 9. A chemical reaction in which heat is released
- 10. When two or more substances form react to form a new substance.
- 12. A group of ions acting as one
- 14. Anything that has mass and occupies space.
- 15. amu
- 17. When non-metals combine this is formed.
- 21. An experiment in which all reactants and all products "accounted" for(even though they are always accounted for).
- 22. A chemical reaction in which heat(energy) is absorbed
- 24. group 1 of elements in the periodic table(not including hydrogen)that are the most reactive metals.