Across
- 2. Electrons not equal to the protons
- 4. number the # of protons in an atom
- 5. a column of elements on the periodic table
- 7. ion ion with a net positive charge
- 8. what semiconductors are made of
- 10. positively charged sub-atomic particle
- 12. up a small portion of the periodic table
Down
- 1. ion Ion with a net negative charge
- 3. zero-charged sub atomic particles
- 6. negatively charged sub-atomic particle
- 7. a row of elements on the periodic table
- 8. makes up most of the periodic table
- 9. same element and different # of neutrons
- 11. center of the atom
- 13. the mass of an atom