Chapter 4 Vocab Science

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Across
  1. 2. an element in group 18 on the periodic table having eight valence electrons that fill the outer energy level(helium is an exception with only two); With a full outer energy level, it is insert(nonreactive)
  2. 4. a table of chemical elements arranged to display their periodic properties in relation to their atomic numbers
  3. 7. an element in group 17 of the periodic table having seven valence electrons; it easily gains an electrons, forming an 1- anion, which causes it to be highly reactive
  4. 8. an element from either two rows usually placed below the periodic table; a member of either the lanthanide or actinide series; it typically had two valence electrons
  5. 11. a column of elements in the periodic table having similar valence electron arrangement, resulting in similar chemical properties; also known as a group
  6. 12. a representation of an atom consisting of its chemical symbol with surrounding dots representing its chemical symbol with surrounding dots representing its valence electrons
  7. 14. any of groups 13-16 in the periodic table; so named because they contain metals metals, nonmetals and metalloids; these groups are often named for the first elements in the family
  8. 15. any elements in groups 3-12 of the periodic table, typically having one or two valence electrons, which it easily loses, resulting on cations with charges of 1+ or 2+
  9. 19. the distance form the center of an atom's nucleus to its outermost energy level
Down
  1. 1. a measure of an element's ability to attract and hold electrons when bonded to other atoms
  2. 3. any electron in the outermost energy level of a neutral atom; unpaired valence electrons are usually involved in chemical bonding
  3. 5. an element in groups of 2 of the periodic table, having two valence electrons that it tends to lose easily to become a 2+ cation, making it very reactive.
  4. 6. the law that states that properties of the elements vary with their atomic numbers in a regular; repeated pattern
  5. 9. an element that typically has four or more valence electrons and that does not exhibit the general properties of metals; located on the right side of the periodic table
  6. 10. An element that is typically dense, solid, ductile, malleable, highly conductive and chemically reactive, especially in the presence of nonmetal elements; metals are located on the left end of the periodic table.
  7. 13. an element in group 1 of the periodic table, having one valence electron that it can easily lose to form a 1+ cation, making it extremely reactive; the most reactive of all the metals
  8. 16. an element with characteristics between those metals and nonmetals
  9. 17. see family
  10. 18. a row on the periodic table of elements; also called a series