Periodic Table
Across
- 3. Very reactive group of elements with 7 valence electrons.
- 5. Designed the first periodic table
- 6. The thing that represents the valence electrons in an atom.
- 8. Transition Metals start on this group number.
- 11. One of two groups that are radioactive with only two elements.
- 14. This metal is lightweight and has an atomic number of 13.
- 15. A molecule with an electric charge.
- 18. These are solids that can easily break and have the ability to conduct electricity.
- 23. This nonmetal is in the first group on the way top.
- 24. A chemical found in many swimming pools and in the Halogens group.
- 25. How many rows are in the periodic table
- 26. This is the classification of alkali metals.
- 28. Negative charge in an atom.
- 30. An alkali metal 3rd in its group.
- 31. These are dense and have high melting points and luster.
- 32. Neutral charge in an atom.
Down
- 1. Positive charge in an atom.
- 2. Electrons in the outermost shell of an atom.
- 4. A noble gas that's 4th in group 18.
- 7. Group with metallic elements and has valence electrons in two shells instead of one.
- 9. The thing that increases down a group in the periodic table.
- 10. Part of the Alkaline Earth Metals and is last in that group.
- 12. This metalloid has an atomic number of 14.
- 13. Group with 3 valence electrons
- 16. The basic unit of a chemical element.
- 17. Is nonflammable, colorless, and fairly nonreactive
- 19. The number of periods this table contains
- 20. Symbol is (Ba) in the group of alkali earth metals.
- 21. Classified as a noble gas and has 8 valence electrons with an atomic number of 10.
- 22. Grouped in actinides and has a symbol (Ac).
- 27. The most reactive element.
- 29. These are brittle, bad conductors of heat, and are not strong.