Across
- 1. How we can describe the ionic lattice
- 4. These gases are monoatomic
- 6. His model of the atom is still used today
- 11. Have different number of neutrons
- 12. These metals are Group 1
- 16. Sodium is more ______________ than lithium
- 18. Shape of the brackets around an ion
- 19. Centre of the atom
- 20. The reaction where Group 7 elements swap in a compound
- 21. The alkali formed when Group 1 metals react with water
Down
- 2. This compound is formed from a metal and non-metal
- 3. Has a mass of 1 and no charge
- 5. He discovered the electron
- 7. These non-metals are Group 7
- 8. What ionic compounds can do in water
- 9. Ordered the elements into octaves
- 10. This is lost or gained to make an ion
- 13. This number is also called the atomic number
- 14. Father of the Periodic Table
- 15. Always make a positive ion
- 17. A group 7 ion