Across
- 3. the creator of the periodic table.
- 4. this element is an actinides.
- 7. all are raidoactive.
- 9. this element is a halogen.
- 10. all lanthanides react ... with most nonmetals.
- 11. what the first version of the table was organized by, increasing ..
- 13. alakali metals react with ... to make strong bases.
- 15. the electrons in the highest energy level.
- 17. the group number that helium is in.
- 19. contains properties of both metals and nonmetals.
- 21. this elelent is a transition metal with an atomic number of 27.
- 23. metals that are silvery gray.
- 27. oxidize when exposed to air.
- 28. nonmetals ... electrons.
- 29. the group number that iodine is in.
- 31. is an alkaline earth metal with an atomic number of 38.
Down
- 1. this element is a noble gas.
- 2. they are relatively soft and have a 2+ charge.
- 5. this element is shiny.
- 6. nonmetals that are the most reactive of all nonmetals.
- 8. the things surrounding each element symbol.
- 12. good conductors of heat and electricity.
- 14. when metals and nonmetals bond together, ions are formed from a ... of electrons.
- 16. the person who provided a way to visualize an atoms structure.
- 18. they are colorless, odorless, and tasteless.
- 20. this is an alkali metal.
- 22. metals ... electrons.
- 24. an atom or molecule with a net electrical charge.
- 25. this element is dull.
- 26. this element is a lanthanides.
- 30. where the elements are organized into a table.