Families of the Periodic Table

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Across
  1. 3. elements that have properties of both metals and nonmetals
  2. 8. the flow of electric charge
  3. 10. separate atomic regions surrounding the nucleus where electrons are found, also known as shells
  4. 12. metals that begin in the fourth period and whose reactivity involves the second-to-outermost shell
  5. 14. elements in column one that have just one electron in their outermost shells and are highly reactive
  6. 15. indicates how many protons an atom of each element has in its nucleus
  7. 16. solid substances that conduct electricity better than insulators, but not as well as conductors
  8. 19. the relative ability of an atom or molecule to undergo a chemical reaction with another atom or molecule
  9. 20. elements in column eight that have full outer shells and are inert
  10. 21. the transfer of electric charge without direct contact
  11. 22. the vertical columns of the periodic table
Down
  1. 1. energy that travels through space in the form of waves
  2. 2. a region around a magnet or current where magnetic forces can be detected
  3. 4. the transfer of electric charge through direct contact
  4. 5. metals metals that are softer than other metals and melt and boil at lower temperatures
  5. 6. not chemically reactive
  6. 7. an atom that has lost or gained electrons
  7. 9. the outer energy level of an atom that contains electrons involved in chemical reactions
  8. 11. lost or gained electrons and became an ion
  9. 13. substances made up of two or more elements that have bonded chemically to form molecules
  10. 17. the type of bond formed when atoms share their outermost electrons in order to end up with full outer shells
  11. 18. the horizontal rows of the periodic table