Across
- 2. COLUMN in the periodic table.
- 3. Same element but different number of neutrons.
- 6. proton ≠ electrons
- 8. A type of bond by atoms donating/accepting electrons.
- 12. ions that LOST electron/s.
- 13. made up of only ONE type of atom.
Down
- 1. DIFFERENT atoms tightly joined together.
- 4. ROW in the periodic table.
- 5. ions that GAINED electron/s.
- 7. Electrons exist at ______ levels surrounding the nucleus.
- 9. A type of bond by SHARING electrons.
- 10. group of atom tightly joined together.
- 11. occupies space and has mass.