Across
- 3. one of the products of the reaction between sodium and water
- 6. Unreactive elements that have a full outer shell
- 7. What Mendeleev left for the undiscovered elements
- 8. The model of the atom described by J.J.Thompson
- 10. The number of neutrons in a Fluorine Atom
- 11. The group that all have seven outer electrons
- 13. The name for a row across the periodic table
- 14. The orange coloured halogen
- 16. the two letter that can represent relative atomic mass
- 18. The name for atoms that have a charge
- 20. The noise made in the test for hydrogen
- 22. the quality of your teacher's science jokes
- 24. The name for group 2 metals
- 27. The type of particle fired in the experiment
- 28. Rutherfords first name
- 29. atoms with the same number of protons but different number of neutrons
- 30. The number of electrons in a Lithium atom
Down
- 1. Gas used in the blimp in the Hindenberg disaster
- 2. The element that was used as a target
- 4. The name for group 1 elements
- 5. The area of the atom discovered by Rutherford
- 9. two atoms joined together in a molecule
- 10. The number of electrons in the outer shell of all the alkaline earth metals
- 12. Another name for the electron shells
- 15. The name for a coloumn running down the periodic table
- 17. The electron configuration of a Potassium atom
- 19. One of the scientists that did the work
- 21. The name given to a very thin layer of metal
- 23. The chemical used to test for Carbon dioxide
- 25. Discovered the periodic table
- 26. One of the scientists that did the work