The Periodic Table

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Across
  1. 2. discovered a pattern to the elements
  2. 4. elements in Group 2
  3. 8. the properties of this element are not like any single group
  4. 9. most elements are classified as this; found on the left of the table
  5. 12. used in thermometers and the only transition metal that is liquid at room temperature
  6. 14. states that repeating chemical and physical properties of elements change periodically with the atomic numbers of the elements
  7. 15. found to the right in the Periodic Table
  8. 17. happening at regular intervals
Down
  1. 1. one of the elements of group 17; combines with most metals to form salts
  2. 2. also called semiconductors
  3. 3. unreactive nonmetals in Group 18
  4. 4. elements in Group 1
  5. 5. group 3-12 in the Periodic Table
  6. 6. shiny reactive metals that are in the same row as lanthanum
  7. 7. forms a wide variety of compounds such as proteins, fats, and carbohydrates
  8. 10. makes up 20% of air
  9. 11. makes up 80% of the air we breathe
  10. 13. radioactive atoms that are in the same row as actinium
  11. 16. a vertical column of elements in the periodic table
  12. 17. a horizontal row of elements in the periodic table