Chemistry Crossword

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Across
  1. 2. Soft, silvery-gray elements located in group 2. COntain 2 valence electrons in outer energy levels. Chemically reactive.
  2. 4. Elements that begin with Actinium are unstable radioactive transition metals.
  3. 7. A row on the periodic table reads from left to right horizontally. Also known as a family.
  4. 8. Elements that begin with Lanthanum; reactive transition elements.
  5. 9. Electrons located in the outer shell or energy level
  6. 10. Column on the periodic table located in a vertical position
Down
  1. 1. Six elements located in group one, excludes Hydrogen, highly reactive. Contains one valence electron in outer energy level.
  2. 3. Elements in group 3-12, also include elements below the periodic table. True metals that are hard, dense, and malleable. Chemically reactive as the outer energy level is partially filled with electrons.
  3. 5. The ease of undergoing a chemical reaction
  4. 6. The measurement of the size of an atom (includes the nucleus and electron cloud)