Across
- 2. what do elements do with their electrons in covalent bonding?
- 4. positively charged particle is a..
- 6. What does the melting point of alkali metals do as you go down the group?
- 9. can be used to seperate a mixture of liquids using their boiling point.
- 13. how many gases are there in the periodic table?
- 14. pudding what model of the atom did JJ Thompson make?
- 15. who discovered the neutron?
- 16. an oxygen atom and a sodium atom would bond to form a..
- 17. Who left gaps in their version of the periodic table?
Down
- 1. group 7 elements are known as the..
- 3. the mobile phase in chromatography is..
- 5. Iron, Cobalt and Nickel are all..
- 7. layers of graphite are..
- 8. negatively charged particles is an..
- 10. metal + non metal bonding is..
- 11. How many atoms are there in the first shell of fluorine?
- 12. What does the symbol Ni stand for?