Across
- 8. Group 2 elements
- 10. The horizontal rows are called ______.
- 11. A metalloid
- 13. Vertical columns
- 14. Electrons on the outermost shell.
Down
- 1. Elements in the middle of the periodic table are the ____ metals.
- 2. Most active nonmetals
- 3. Most of the elements are ____.
- 4. Nonmetals occur in pairs called_____ molecules.
- 5. Inactive gases.
- 6. The sum of the protons and neutrons is the_____ number.
- 7. The elements are arranged by _____ number
- 9. Group 1 elements
- 10. The atomic number is the number of_______.
- 12. Liquid nonmetal