Across
- 2. the melting and boiling point of ionic substances is...
- 8. aluminium has 13 of these sub-atomic particles
- 9. this group in the periodic table forms ions with a 2- charge
- 11. part of the atom where protons are found
- 12. an atom that has lost or gained electrons
- 13. the type of bonding between a metal and a non metal
- 15. sub-atomic particles with a negative charge
- 18. the scientist that suggested electrons orbit the atom in shells
Down
- 1. the strong force of attraction between positive and negative ions
- 3. the number of outer shell electrons tells you this number
- 4. ions can move to conduct electricity if melted or...
- 5. to conduct electricity, particles must be
- 6. bonding that involves sharing of electrons
- 7. two or more elements chemically combined
- 10. the type of charge all metals have
- 14. elements in this group lose one electron to become stable
- 16. this group in the periodic table forms ions with a 2+ charge
- 17. overall charge of the atom