Across
- 1. when proton and neutrons added together it's the-
- 5. two parts of an atom that equal the same
- 7. how the periodic table is arranged
- 11. negative charge
- 13. electrons are located in-
- 15. the staircase elements
- 16. positive charge
- 17. the structure of an atom
- 18. different words for rows and columns on a periodic table
- 19. a representation of an atom
Down
- 2. no charge
- 3. in the middle of an atom
- 4. the study of the makeup of chemical elements and their structure
- 6. the number of protons and electrons
- 8. smallest part of an element
- 9. the mass of an atom
- 10. how an element is identified
- 12. something made up of one type of atom
- 14. right side of the periodic table
- 15. left side of the periodic table
- 16. rows and columns of substances organized by an atomic number