Across
- 4. 1st element on the periodic table
- 5. A type of atom with the same number of protons
- 7. Where most of our drinking water comes from
- 10. the center of an atom
- 11. when water defines gravity
- 14. the horizontal grouping on the periodic table
- 15. Who created the "Plum pudding" model of an atom
Down
- 1. An electron on the outer most shell
- 2. a non-reactive substance
- 3. the property that lets water stick to itself
- 6. water is called the ____________ because it can dissolve most things
- 8. a highly reactive non-metal
- 9. The neutrally charged molecule in the nucleus
- 12. what does the "P" in APE MAN stand for
- 13. Positive charged Ion