Chemistery Crossword

4. amount of mass in a given volume of a substance
5. vertical column of elements in the periodic table
6. element that has both metal and non-metal properties
8. shiny, malleable, ductile element that conducts electricity
12. invisible negatively charged particle that orbits the nucleus of an atom
13. pure substances formed when non-metals combine
18. atom that has become electrically charged
20. catalyst involved in chemical reactions in living things
22. description of a substance that can be pounded or rolled into sheets
23. a substance that is neither an acid nor a base
25. elements and compounds that organisms need fro living

1. pure substance that cannot be broken down into other substances
2. substance that helps a chemical reaction to proceed more quickly
3. combination of pure substances
7. pure substance formed when at least one metal and non-metal combine
9. horizontal row of elements in the periodic table
10. group 18 elements in the periodic table
11. group 17 elements in the periodic table
14. an experiment in which 1 or more products of a chemical reaction can escape
15. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
16. group of atoms joined by covalent bonds
17. neutral particle in the nucleus of an atom
19. dull, brittle element that does not conduct electricity
21. chemical combination of 2 or more elements in a specific ratio
24. the smallest part of an element that is representative of that element