Across
- 3. the table of elements
- 6. has an atomic number of 76
- 8. elements on periodic table that do NOT conduct electricity
- 11. subatomic particle with negative charge
Down
- 1. elements with properties of metals and nonmetals
- 2. this can be found int he center of an atom
- 4. a change that cannot be reversed and forms a new substance
- 5. has an atomic mass of 184
- 7. a change that can be undone and no new substance is formed
- 8. subatomic particle with neutral charge
- 9. the largest category of elements on the periodic table
- 10. subatomic particle with positive charge