Across
- 2. Where protons and neutrons are found
- 5. The charge of an alpha particle.
- 7. Group 0 elements are ......
- 11. Name for group 1.
- 15. Use of Helium.
- 17. The scientist that discovered neutrons.
- 18. When group 1 metals react with water, they produce a gas called .....
- 19. Charge of an electron.
- 20. The most reactive out of: Lithium, Sodium and Potassium.
- 24. All group 7 elements have .... outer shell electrons.
- 26. The name for group 0 is ... gases.
- 27. Lithium + water > lithium ..... + hydrogen
Down
- 1. ... and Radon are radioactive.
- 3. When group 7 elements react, they ... one electron.
- 4. Mass number - atomic number = the number of .....
- 6. There are two phases in chromatography: stationary and ....
- 8. The number of protons = the ......
- 9. Group 0 elements have a .... outer shell of electrons.
- 10. Mendeleev left .... in the early periodic table.
- 12. The more .... a substance is, the higher up the chromatography paper it will travel.
- 13. The name for group 7.
- 14. The maximum number of electrons that can be put on the first shell.
- 16. In the early periodic table, Mendeleev put elements in order of ....
- 20. The start line in chromatography needs to be drawn in ....
- 21. Where electrons are found.
- 22. Elements with the same number of protons but different neutrons are called ....
- 23. Rutherford found that ... and charge were concentrated in the nucleus.
- 25. When group 1 metals are put on water, they will ...