Across
- 1. Early models of the atom
- 4. An electron in the outermost energy level of an atom
- 6. First name of the designer of the periodic table
- 7. Any of the possible energies an electron may have in an atom
- 9. The side tht the metals are found
- 11. Have a neutral charge
Down
- 2. The side that the non-metals are found
- 3. Last name of the designer of the periodic table of elements
- 5. Number of protons
- 8. Have a negative charge
- 10. Have a positive charge