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