chemistry crossword

5. chemical combination of two or more elements in a specific ratio
6. a material that electric change can move through easily
7. change of state from a gas to a liquid
8. element that has both metallic and non-metallic properties
10. pure substance formed when at least one metal and one non-metal combine
12. invisible negatively charged particle that orbits the nucleus of an atom
15. a reaction that takes place when two or more substances react to form new substances
19. atom that has become electrically charged because it has lost or gained electrons
21. an experiment in which one or more products of a chemical reaction can escape
22. group 2 elements in the periodic table
25. group 17 elements in the periodic table;the most reactive non-metals

1. ability of a substance to conduct electricity or heat
2. horizontal row of elements in the periodic table
3. pure substance that cannot be broken down into other substances
4. sum of the number of protons and neutrons in an atom
7. results when two or more substances react to create a different substance or substances, the new substances have completely different properties from the original ones
9. change of state from a gas to a solid
11. results when two or more substance react to create a different substance or substances
13. description of how a substance interacts with other substances
14. amount of protons in the nucleus of one atom of an element
15. principle that matter is not created or destroyed in a chemical reaction
16. description of a substance that can be pounded or rolled into sheets
17. an experiment in which all reactants and all products of a chemical reaction are accounted for
18. dull brittle element that does not conduct electrons
20. mass of one atom of an element calculated from the total number of protons
22. group 1 elements in the periodic table
23. the smallest part of an element that is representative of that element
24. group 18 in the periodic table the most stable and nonreactive elements