Across
- 1. The elements in group 14-16, poor conductors of heat and electricity
- 2. Group 16, Oxygen, Sulfur, Selenium, Tellurium, Polonium
- 3. The elements in group 3 including Plutonium and uranium
- 4. The elements in group two of the periodic table
- 9. A model of an atom that clearly shows the location of electrons
- 10. One twelfth the mass of a carbon 12 atom
- 11. In between metals and non-metals, has characteristics of both
- 12. Group 14, Carbon, Tin, Silicon, Lead, Germanium, Ununquadium
- 13. The elements in group 17 or group 7A, really reactive
- 14. An atom that has a different mass then the average atom
- 15. Electron in the outermost energy level of and atom
- 17. The middle of an atom, most of its mass, made of sub atomic particles
- 18. Malleable, High melting point
Down
- 1. Nitrogen, Phosphorous, Arsenic, Antimony, Bismuth
- 4. The elements in group 1A of the periodic table
- 5. A model of an atom that clearly shows the movement of an atom
- 6. The elements in groups 3-12
- 7. The mass of an atom, also the combined value of protons and neutrons
- 8. Protons, Neutrons, and Electrons
- 16. The elements in group 8A very unreactive