Periodic Table Review

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Across
  1. 4. Group 1 elements, highly reactive.
  2. 5. Elements with properties of both metals and nonmetals.
  3. 7. Energy required to remove an electron from an atom.
  4. 8. Group 17, very reactive nonmetals.
  5. 10. Group 18, inert gases with full outer shells.
  6. 11. Patterns in properties across periods or down groups.
  7. 14. Sum of protons and neutrons.
  8. 18. Elements that are shiny, malleable, and good conductors.
  9. 19. The distance from the nucleus to the outermost electron.
  10. 20. The ability of an atom to attract electrons.
Down
  1. 1. Groups 3-12, contain metals with various charges.
  2. 2. Electrons in the outermost shell involved in bonding.
  3. 3. A horizontal row in the periodic table.
  4. 6. A vertical column in the periodic table.
  5. 9. The arrangement of electrons in an atom’s orbitals.
  6. 12. Group 2 elements, less reactive than alkali metals.
  7. 13. How likely an element is to undergo a chemical change.
  8. 15. Number of protons in an atom.
  9. 16. Elements that are brittle and poor conductors.
  10. 17. Atoms with the same number of protons but different neutrons.