Periodic Table Crossword

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Across
  1. 2. number of Protons
  2. 4. another word for unreactive
  3. 5. has the highest electronegativity
  4. 6. a measure of whether or not atoms will trade electrons with other atoms
  5. 8. completely unreactive
  6. 10. column
  7. 15. size of an atom
  8. 18. electrons on the outer shell
  9. 19. a pattern of change
  10. 20. row
  11. 21. abbreviation of the atoms name
  12. 22. the quantity of something per unit volume,unit area, or unit length
Down
  1. 1. the act of emitting radiation spontaneously
  2. 3. measure of the pull an atom has on a electron
  3. 7. the sum of protons and neutrons
  4. 9. Increases reactivity going DOWN
  5. 11. measures how strongly a Vẽ is held by nucleus
  6. 12. inner rings of electrons
  7. 13. the temperature at which its vapor pressure is equal to the pressure of the gas above it
  8. 14. Increases in reactivity going UP
  9. 16. Follows the trends of Alkali metal but less reactive
  10. 17. temperature at which the solid and liquid forms of a pure substance can exist in equilibrium