Periodic Trends

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Across
  1. 3. the distance from the nucleus of an ion up to which it has an influence on its electron cloud
  2. 4. ions that are negatively charged
  3. 6. patterns in elements on the periodic table
  4. 8. characteristic of a substance that may be observed when it participates in a chemical reaction
  5. 9. any substance that cannot be decomposed into simpler substances by ordinary chemical processes
  6. 10. vertical division of a page or text
  7. 14. tendency of an atom to attract electrons in a molecule
  8. 15. amount of energy required to remove an electron from an isolated atom or molecule
  9. 16. When an atom has an equal number of electrons and protons
  10. 17. column in the periodic table of the chemical elements
Down
  1. 1. arranges the chemical elements into rows and columns
  2. 2. blocking of valence shell electron attraction by the nucleus, due to the presence of inner-shell electrons
  3. 5. becoming smaller or fewer in size, amount, intensity, or degree
  4. 7. measure of the size of an atom
  5. 11. becoming greater in size, amount, or degree
  6. 12. ions that are positively charged
  7. 13. horizontal row of the periodic table
  8. 18. horizontal arrangement of items