Across
- 2. how the electrons are arranged
- 4. how an atoms valence electrons interact
- 10. positive and located in the nucleus
- 12. where the electrons are located
- 13. the number of protons in the nucleus
- 14. neutral and located in the nucleus
- 15. A column of elements
Down
- 1. Where you find information on elements
- 3. what the atom is made of
- 5. A row of chemical elements
- 6. located on the outermost shell
- 7. protons and neutrons combined weight
- 8. where the protons and neutrons are
- 9. A charged atom
- 11. smallest unit of an element