Across
- 2. neutral particle in the atom
- 4. where electrons are located
- 6. the number of protons in an atom
- 10. two or more different elements chemically combined
- 12. all atoms having the same atomic number
- 13. the state where all electrons are at the lowest energy level available
Down
- 1. negatively charged particles in the atom
- 3. this particle determines the atomic number of an element
- 5. the average mass of all isotopes of an element
- 7. atoms of the same element but different mass
- 8. the state where electrons have absorbed energy and jumped to a higher energy level
- 9. the highest energy level in an atom, furthest from the nucleus
- 11. contains protons and neutrons