chemistry crossword

1. a material that electric charge can move through easily
4. property- property that is measurable, whose value describes a state of a physical system. The changes in the physical properties of a system can be used to describe its transformations or evolutions between its momentary states.
6. number- number of protons in the nucleus of one atom of an element
7. combination of two or more elements in a specific ratio
9. for producing electricity from chemical or solar energy
11. description of a solid that can be be stretched into a long wire
12. a cloudy mixture in which tiny particles of one substance are held within another and particles cannot be separated out from the other substance
13. negatively charged particle that orbits the nucleus of an atom
14. rate of which charged particles flow
15. change-change that results when two or more substances react to create a different substance or substances.
16. substance that cannot be broken down into other substances
17. that dissolves in water to form a solution with PH higher than 7
20. mass unit- measure of atomic mass; 1 amu is equal to 1/12th the mass of a carbon 12 atom

1. chemical change that occurs when oxygen in air reacts with metal
2. electricity-electricity that flows continuously
3. energy- energy stored in chemicals and released when chemicals react
5. system- an experiment in which all reactants and all products of a chemical reaction are accounted for
7. reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
8. involved in chemical reactions in living things
10. change-change that results when two or more substances react to create a different substance
18. substance that helps a chemical reaction to proceed more quickly
19. of the present of hydrogen ions in a solution