Makayla Hair PS211- B 11-15-24

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Across
  1. 2. An element in group 17 of the periodic table has seven valence electrons. It quickly gains an electron, forming a 1 - anion, which causes it to be highly reactive.
  2. 4. A column of elements in the periodic table having similar valence electron arrangement, resulting in similar chemical properties; also known as a group.
  3. 5. electrons- Any electron in the outermost energy level of a neutral atom. Unpaired valence electrons are usually involved in chemical bonding.
  4. 8. metals- An element in group 2 of the periodic table, having two valence electrons that it tends to lose easily to become a 2+ cation, making it very reactive.
  5. 9. metals- Any elements in groups 3-12 of the periodic table, typically having one or two valence electrons, which it easily loses, resulting in cations with charges of 1 + or 2+.
  6. 10. law- The law that states that the properties of the elements vary with their atomic numbers in a regular, repeated pattern.
  7. 12. groups– A wave from the upper end of the radio wave band; used for navigation, communication, and cooking.
  8. 13. radius- The distance from the center of an atom’s nucleus to its outermost energy level.
  9. 14. see family.
Down
  1. 1. A measure of an element’s ability to attract and hold electrons when bonded to other atoms.
  2. 3. gases- An element in group 18 on the periodic table having with valence electrons that fill the outer energy level. With a full outer energy level, it is inert.
  3. 6. metals- 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.
  4. 7. dot notation- A representation of an atom consisting of its chemical symbol with surrounding dots representing its valence electrons.
  5. 10. A row in the periodic table of the elements; also called a series. The time interval for one complete cycle of periodic motion.
  6. 11. transition metals- An element from either of two rows usually placed below the periodic table; a member of either the lanthanide or actnide series. It typically has two valence electrons.