Unit 5 Periodic Table

123456789101112
Across
  1. 4. what is the only metal that is a liquid at room temperature?
  2. 6. the columns of the periodic table. all elements in this _______ have the same number of valence electrons
  3. 7. the attraction of one atom's nucleus to the electron of another atom
  4. 9. metals found in group 2 and second most reactive group of metals
  5. 12. elements found in groups 3-12
Down
  1. 1. the size of an atom measured from its center to its outermost energy shell
  2. 2. which is nonmetal is located to the far left of the periodic table
  3. 3. the amount of energy needed to pull a valence electron from an atom
  4. 5. the rows of the periodic table who's number indicates the amount of energy levels an element has
  5. 8. group of metals that are the most reactive
  6. 10. a group of elements that are unreactive because they already have a complete outer shell
  7. 11. which group has all 3 phases of matter at room temperature and are also the most reactive nonmetals?