Across
- 2. state the level closest to the nucleus is the lowest energy level.
- 4. 2 forms of the some element with different masses
- 5. of neutrons atomic number minus mass number
- 7. Atom with positive charge
- 9. neutral particle in the nucleus
- 11. energy level the farther away form the nucleus the electron is located
- 12. diagram the chemical symbol represented the nucleus and all internal electrons
- 14. any solid, liquid or gas
- 16. electrons the outermost electron in an atom
- 18. ion #p>#E
Down
- 1. it’s the first element in the periodic table
- 3. rule an atom is most stable when it has 8 valence electrons
- 6. number number of protons and neutrons
- 8. mass proton+ neutron
- 10. charge charge or neutron
- 13. cloud. Location of electrons
- 15. the neutron is located here
- 17. the proton identity’s it