Across
- 2. the branch of science that studies chemicals and elements
- 4. the part of an atom that is mass-less
- 5. Atoms outside of the nucleus determine reactivity. Up and Down on the periodic table
- 7. columns on a periodic table
- 11. how you determine similar properties
- 15. _______ levels is what periods measure on a periodic table
- 16. the side on a periodic table that is more stable
- 17. the little numbers in a chemical formula
- 18. the famous element from superman
- 19. the letters in an element
Down
- 1. Located in the Nucleus and has a neutral charge
- 2. The big number in front of a chemical equation
- 3. numbers with decimal points below the symbol
- 6. acronym of the unit of measurement to measure atoms
- 8. Located in the Nucleus and has a positive charge.
- 9. In the ______ cloud and has a negative charge
- 10. ______ number the small number over the symbol.
- 12. rows on a periodic table
- 13. the side on a periodic table that is more reactive
- 14. holds all protons and neutrons