Across
- 2. compounds that have a bond between metals and non-metals
- 3. group that makes 1- ions
- 5. word used to describe the outermost electron shell
- 6. uncharged particle found in the nucleus
- 11. consists of two or more elements
- 12. compounds in which atoms share electrons
- 15. metals found in centre of periodic table
- 16. indicates the number of nucleons in the nucleus
- 17. group that makes 1+ ions
Down
- 1. positively charged particle in the nucleus
- 4. negative particle that orbits the nucleus
- 7. indicates the number of protons in the nucleus
- 8. consists of only one type of atom
- 9. type of ion that has more than one element in it
- 10. building blocks of all matter
- 13. formed when an atom loses electrons
- 14. elements with a full valence shell
- 16. consists of two or more atoms
- 18. formed when an atom gains electrons