Across
- 2. A reaction that can occur when atoms bump into one another
- 4. A variations of an element that have different numbers of neutrons
- 6. Verticle column of periodictable
- 12. The group 2 elements are known as...
- 13. Metals and non-metals bonding together
- 14. The smallest particles that makes up of everything in the universe
- 15. What is at the centre of each atoms
Down
- 1. The name for electrons on the outer shells.
- 3. Elements with symbol P
- 5. An element that have a full outer shells but does not contains 8 valence electrons
- 7. The biggest and most reactive metal atoms in group 1
- 8. Non-metals that are in group 17
- 9. A table that lists all the known elements
- 10. Another name for noble gases
- 11. One of periodic table special blocks of elements