Across
- 3. group 17 of the periodic table
- 6. positive charged subatomic particle
- 10. the number of protons in an atom (identifies the element)
- 13. brittle poor conductor of electricity
- 14. the total mass of an atom (protons + neutrons)
- 15. have full outer shells, stable, not likely to react
Down
- 1. horizontal rows of the periodic table
- 2. neutral subatomic particle found in the nucleus
- 4. a positive, or negative charged particle of group of atoms
- 5. negative subatomic particle plays a key role electrical current
- 6. arrangement of chemical elements in order of atomic number
- 7. visual representation of bonds between atoms
- 8. malleable (bendable) good conductors of electricity and or heat
- 9. vertical columns of the periodic table
- 11. elements that have a different number of neutrons than protons
- 12. building block of all matter