Across
- 3. State without charge
- 5. A particle carrying light
- 8. The last shell in the electron config.
- 12. A negatively charged ion
- 15. The building blocks of the universe
- 16. Name of elements in the middle
- 19. Number of protons plus electrons
- 21. A particle circling the atom
- 23. The centre of an atom
- 24. Elements 57-71
- 25. Electrons in the last electron shell
- 27. An atom with more/less electrons
- 28. Group 18 on the periodic table
- 29. Group 17 in Periodic table
Down
- 1. An element with more/less neutrons
- 2. Number of protons
- 4. The charged state of an atom
- 5. Rows in the Periodic Table
- 6. Elements with mixtures of metals and non metals
- 7. Transfer of valence electrons
- 9. Group 1 of the periodic table
- 10. Two bonded elements
- 11. The setup of electrons
- 13. Current model of atom
- 14. Columns in the periodic table
- 17. Elements 89-103
- 18. The space around an atom that electrons travel in
- 20. Simplest form of a substance
- 22. Positively charged ion
- 26. Subatomic particle with no charge