Across
- 2. a version of an element with a different number of neutrons
- 4. bond formed by oppositely charged atoms
- 6. negatively charged particle
- 8. positively charged particle
- 10. the electrons around the nucleus
- 11. high speed electron (-iE)
- 14. the theory that explains metallic bonds
- 17. neutral charged particle
- 21. electrons that have been given up and move freely
Down
- 1. same atoms come together and bond; producing delocalized electrons
- 3. the force that keeps the nucleus from flying away
- 5. unstable nucleus that tries to become stable
- 7. the electromagnetic attraction between atoms
- 9. the center of an atom
- 12. the building blocks of matter
- 13. helium (He)
- 15. atoms share electrons to have a full set of valence electrons
- 16. the attraction between the positive nucleus and all the negative electrons
- 18. a group of atoms bonded together
- 19. different types of atoms
- 20. a charged atom