Chemistry crossword

2. The material at the start of a reaction.
5. Is a chemical reaction that occurs when oxygen reacts with a new substance to form a new substance
6. Positively charged particle in the nucleus of an atom
7. invisible negatively charged particle that orbits the nucleus of an atom
11. an atomic number of 80 and a atomic mass of 200.6
12. compound: When non-metals combine
13. table: A table in which the elements are organized by their physical and chemical properties
14. substances that help a reaction proceed faster.
15. atomic number of 20 and atomic mass of 40.1
17. atomic number of 7 and atomic mass of 14
19. atomic number of 26 and atomic mass of 55.8
20. anything that has mass and occupies space
21. number of 11 and mass of 23
23. number of 2 and mass of 14

1. another system of easy-to-see warning symbols on hazardous materials
3. chemical reaction that releases energy
4. number of 29 and mass of 63.5
8. formula: identifies witch elements and how much of each, are in the compound
9. number of 1 and mass of 1
10. The new material produced by the reaction.
16. atomic number of 92 and atomic mass of 238
17. atomic number of 28 and atomic mass of 58.7
18. catalyst involved in chemical reaction in living things
22. atomic number of 8 and atomic mass of 16
24. compound: Pure substance formed when at least one metal and one-non metal combine