Across
- 3. consists of two atoms
- 7. Horizontal list of words
- 8. A diagram that shows the arrangement of electrons in an atom
- 9. outermost electron shell
- 10. ____compound
- 12. _____diagram
- 15. Core of a atom
- 17. Having neither acid nor basic properties
- 18. in group 18
- 21. multiple atoms share electrons
- 25. ______nanotube
- 27. ___________electron
- 28. negative or positive charge
Down
- 1. ____table
- 2. vertical lists of elements
- 4. _____number
- 5. H
- 6. characterised of metals and non metals
- 7. 2 or more atoms that bond together
- 11. pure substance
- 13. Be
- 14. collection of elements
- 16. negatively charged ion
- 19. positively charged ion
- 20. 17 elements in periodic table
- 22. ____technology
- 23. a stable subatomic particle, symbol p
- 24. a negatively charged subatomic particle.
- 26. Ne