Periodic Table

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Across
  1. 4. an element's letter
  2. 6. metals that can be hammered, pounded, or pressed
  3. 8. this makes of 75% of the elements in the periodic table
  4. 9. positively charged
  5. 11. there are 17 of these types of elements in the periodic table
  6. 13. total number of protons and neutrons
  7. 15. the number of protons in an atom
  8. 18. elements in a column
  9. 19. the lanthanide elements and actinide elements
  10. 20. group 1
Down
  1. 1. has protons and neutrons in it
  2. 2. elements can be grouped in families by this
  3. 3. elements in each family will do this differently with other elements
  4. 5. their properties have characteristics that are in between metals and nonmetals
  5. 7. negatively charged
  6. 10. zero charge
  7. 12. these include metals, nonmetals, and metalloids
  8. 14. group 3
  9. 16. horizontal rows of the periodic table
  10. 17. each family has this to differentiate itself from other families on the periodic table