Match the terms with their definition: words: 1. matter 2. solid 3. liquid 4: gas 5. proton 6. electron 7. atomic mass 8. isotopes 9. compounds 10. molecule 11. reactants 12. products definitions: a. anything that takes up space and is made of atoms. b. positively charged particles c. no fixed volume, no fixed shape d. fixed volume, fixed shape e. fixed volume, no fixed shape f. atoms that are the same with different amounts of neutrons g. negatively charged particles h. sum of protons and neutrons i: matter that is made of more than one element j. two or more atoms boned together k. resulting substances in a reaction l: starting substances in a reaction