Across
- 2. The centre of the atom containing protons and neutrons
- 4. The columns in the periodic table
- 5. A subatomic particle with a negative charge
- 7. What happens to reactivity as you go down Group 7
- 11. The total number of protons and neutrons
- 14. The part of the atom where electrons are found
- 18. The arrangement of electrons in shells
- 20. The rows in the periodic table
- 24. An atom that has gained or lost electrons
- 25. Found on the right side of the periodic table
- 27. The charge on an ion that has lost electrons
- 28. Discovered the electron and made the plum pudding model
- 30. The number of protons in an atom
Down
- 1. Name of the table of elements
- 3. A substance made of only one type of atom
- 6. The charge on an ion that has gained electrons
- 8. Scientist who arranged the first useful periodic table
- 9. Discovered the neutron
- 10. Discovered the nucleus with the gold foil experiment
- 12. A subatomic particle with no charge
- 13. Group 1 metals that react with water
- 15. Suggested electrons move in fixed orbits
- 16. Increases as you go down Group 1
- 17. Group 0 gases that are unreactive
- 19. Found on the left side of the periodic table
- 21. Scientist who first described atoms as solid spheres
- 22. A subatomic particle with a positive charge
- 23. Noble gases have this type of outer shell
- 26. Atoms of the same element with different numbers of neutrons
- 29. Group 7 non-metals that get less reactive down the group