Across
- 1. The ____ have high melting and boiling points
- 3. most reactive nonmetal group
- 7. Lithium is in this group of metals
- 11. lithium is this type of element
- 12. metals have _____ melting points(usually are solids)
- 14. iconic charge of oxygen
- 17. Hydrogen is this type of element
- 19. this kind of metal is group 3-12
- 21. nonmetals are _____ and break easily
- 22. boron is this type of element
- 25. alkali have _____ melting and boiling points relative to other metals
- 27. who is credited for organizing the first periodic table
- 28. The _____ react with water to form bases
- 29. ____ is most reactive nonmetal
- 30. thorium is in this group
- 31. The _____ is the most reactive metal
- 32. metalloids are better _____ than nonmetal but not as good as metals
Down
- 2. The ____ essentially non reactive, inert
- 4. metals that become positive are called...
- 5. alkali metals react with this to form strong bases
- 6. how many valence electrons does krypton have
- 8. The ____ all are radioactive
- 9. how many valence electrons hydrogen have
- 10. cerium is in this group
- 13. Fluorine is in this kind of nonmetal group
- 15. The ____ have multiple oxidation states
- 16. how many valence electrons carbon have
- 18. Mendeleev organized the elements in order of increasing atomic ___
- 20. How is the modern periodic table organized
- 23. Helium is in this kind of gas
- 24. these types of elements become negative ions
- 26. Beryllium is an ______ of earth metals