Across
- 4. repeats at regular intervals
- 6. dull, brittle elements that are poor conductors
- 7. nonmetal that is liquid at STP in Group 17
- 9. size of an ion
- 11. metalloid in period 2
- 14. vertical columns on the periodic table
- 15. this element has the symbol Li
- 18. lustrous, malleable elements that are good conductors
- 20. having the same number of electrons or the same electron configuration
Down
- 1. most reactive nonmetal
- 2. consisting of two atoms
- 3. measure of attraction of a nucleus in bonded electrons
- 5. most metals on the periodic table are __________ metals
- 8. horizontal rows on the periodic table
- 10. only element in group 6 with three oxidation states
- 12. size of a neutral atom
- 13. element with an atomic mass of 40.08
- 16. metal that is liquid at STP in Group 12
- 17. element with an atomic number of one
- 19. have properties of metals and nonmetals