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