chemistry lab

2. positively charged center of an atom
4. description of a solid that can be stretched into a long wire
5. slow chemical change that occurs when oxygen in air reacts with metals
6. Change a change in where 2 or more substances react to create a new substance with completely different properties
9. vertical column of elements in the periodic table
10. Metals group 1 in the periodic table, not including hydrogen
11. dull, brittle element that does not conduct electricity
13. Solution a solution in which water is the solvent
14. Formula combination of symbols that represent a compound
18. Number number of protons in the nucleus of one atom of an element
19. change of state from a solid to a liquid
21. Gases group 18 in the periodic table
22. combination of pure substances
23. an atom that has become electrically charged
24. System an experiment in which all reactants and all products of a chemical reaction are accounted for

1. amount of mass in a given volume of a substance
3. anything that has mass and occupies space
4. change of state from a gas to a solid
7. substance that helps a chemical reaction to proceed more quickly
8. chemical reaction that occurs when oxygen reacts with a substance to form a new substance and give off energy
12. description of a substance that can be rolled or pounded into sheets
15. group 17 in the periodic table of elements
16. chemical combination of two or more elements in a specific ratio
17. pure substance made up of only one type atom
20. Mass mass of one element of an atom