Across
- 1. vertical column on the periodic table
- 4. determined that electrons live in specific energy levels
- 8. most important personal protective equipment
- 9. number of letters NOT on the periodic table
- 11. ion with a positive charge
- 13. how the periodic table was originally arranged
- 14. molecular shape of carbon dioxide
- 16. Dalton's model
- 20. "You must be able to tell any 2 electrons apart!"
- 22. rearrangement of atoms or elements
- 25. alkali metal with a 1 letter atomic symbol
- 26. elements that are NOT filling their valence energy level
- 27. only liquid metal at room temperature
- 29. type of bond formed bewteen sodium and chlorine
- 30. number of nonmetals with a 1 letter atomic symbol
- 31. Br-79 and Br-81 OR C-12 and C-13
- 33. group name for elements with 7 valence electrons
Down
- 2. solid to liquid
- 3. inversely related to frequency
- 5. info collected directly with the senses
- 6. number of particles in 1 mole
- 7. basically a helium nucleus
- 10. noble gases have this
- 12. number of valence electrons in nitrogen
- 15. elements found on the stair step line
- 17. outermost electron that participates in bonding
- 18. one intensive property
- 19. scientist who found the nucleus
- 21. measures mass in the lab
- 23. alkaline earth metal with 4 total energy levels
- 24. no definite shape, no definite volume
- 28. technology used in nuclear power plants
- 32. element found in pencils and diamonds