Across
- 5. The outermost shell of an atom.
- 9. Particle with a neutral charge.
- 10. Name for the vertical columns in the periodic table.
- 12. Positively charged atom.
- 13. The number of protons in an atom.
- 14. The maximum number of electrons in a valence shell.
- 15. Center of an atom that contains protons and neutrons.
- 16. What happens to electrons in an ionic bond.
Down
- 1. The joining of a metal atom and non-metal atom.
- 2. An electron in the out shell of an atom.
- 3. Particle with a negative charge.
- 4. Name for the horizontal rows in the periodic table.
- 6. Particle with a positive charge.
- 7. Negatively charged atom.
- 8. What do opposite charges do?
- 11. The number of protons + neutrons in an atom.