Chapter 4. Science

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Across
  1. 6. An element from either two rows usually placed below the periodic table a member of either the lanthandle or actinidle series.
  2. 7. The distance from the center of an atoms nucleus to its outermost energy level.
  3. 8. A column of elements in the periodic table.
  4. 10. An element in group one of the periodic table having one valence electron that can easily lose to form of a 1+ cation.
  5. 12. A element in group 18 on the periodic table having eight valence electrons that fill the outer energy level.
  6. 14. Any groups of 13-16 in the periodic table so named because they contain metals,nonmetals and metalloids.
  7. 16. A representation of an atom consisting of its chemical symbol with surrounding dots representing its valence electrons.
  8. 17. A column of elements in the periodic table having similar valence electron arrgangement.
  9. 18. An element in group two of the periodic table having two valence electrons that it tends to lose easily to become 2+ cation.
  10. 19. The law that states that the properties of the elements vary with their atomic number in a regular repeated pattern.
Down
  1. 1. A table of the chemical elements arranged to display their periodic properties of the elements with their atomic numbers.
  2. 2. A measure of a elements ability to attract and hold electrons when bonded to other atoms.
  3. 3. A row in the periodic table of elements also called a series
  4. 4. An element with characteristics between those of metals and nonmetals, also called semiconductors.
  5. 5. Any electron in the outermost energy level of a neutral atom. Unpaired valence electrons are usually involved in chemical bonding.
  6. 9. An element in Group 17b of the periodic table having seven valanceelectrons it is easily gains an electron.
  7. 11. An element that typically has four or more valence electrons and that does not exhibit the general properties of metal.
  8. 13. Any elements in groups 3-12 of the periodic table typically having one or more valence electrons.
  9. 15. An element that is typically dense,solid,ductile,malleable,highly conductive and chemically reactive