Match each letter with the definition 1. atomic mass a. tells the number of protons in the nucleus of an element 2. atomic number b. states that matter is neither created nor destroyed 3. electron c. elements that generally have a shiny or metallic luster 4. element d. anything that has mass and takes up space 5. law of conservation of matter e. positively charged central part of the atom 6. matter f. negatively charged subatomic particle 7. metal g. matter made up of only one kind of atom 8. neutron h. weighted average mass of an element 9. nucleus i. uncharged particle in the nucleus of an atom 10. proton j. positively charged subatomic particle