Periodic Table

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Across
  1. 3. This represents the number of valance electrons in the form of valence electrons in the form of dots for an element
  2. 6. Nonmetals that are the most reactive and have high electronegativity
  3. 8. Actinium is a classification of this group
  4. 9. These types of substances contain both properties contained in Metals and Nonmetals. They can be shiny or dull, and easy or hard to change their shape
  5. 10. Found out that the atomic number is what organizes the periodic table.
  6. 12. Transition Metals have multiple _________ states and are malleable
  7. 14. Developed the first periodic table by increasing atomic mass, but did not get credit due to "incompleteness"
  8. 17. Polonium is a classification of this element
  9. 18. A classification of this element is Iodine
  10. 22. Anions are atoms that have a ___________ charge
  11. 23. A classification of this group is the element Lithium
  12. 28. "Rare Earth Metals." This group has elements that are shiny/silvery white and oxidize when exposed to air
  13. 29. This group has relatively soft elements, not found alone in nature, and is less reactive than alkali metals
  14. 30. Tellurium is a classification of this element
Down
  1. 1. This group has an ionic charge of +2
  2. 2. These are the outermost electrons and in the highest energy level.
  3. 4. an ion is an atom with a _______
  4. 5. This group reacts with water and is less reactive compared to alkali metals
  5. 7. Ions that are positively charged
  6. 11. Metals have many characteristics. Some characteristics are the fact that they’re shiny, _________, and are most likely to corrode.
  7. 13. Titanium is a classification of this Group
  8. 15. Nonmetals are usually ____ and have a low density and melting point.
  9. 16. Alkali Metals have a _______ ____ color and are very soft substances
  10. 19. Helium is a classification of this group
  11. 20. This group reacts with water to create strong bases
  12. 21. A classification of this group is Fluorine
  13. 24. Noble gases are elements that are considered colorless, tasteless, and ________.
  14. 25. Cerium is a classification of this element
  15. 26. Actinides are grouped into a row on the periodic table and all the elements in this row are considered ___________.
  16. 27. Russian Chemist who Created an extended version of Newlands' table and is generally given credit