Across
- 3. The number of protons in an atom
- 6. An isotope in which the nucleus is likely to break apart
- 8. The energy or particles released during radioactive decay
- 9. An atom or molecule with a net positive charge
- 10. The number of protons and neutrons in an atom
- 13. A variation of an element with a certain number of neutrons in each atom
- 15. A group of atoms bonded together
- 16. The smallest particle of an element
- 17. A large subatomic particle with positive charge
Down
- 1. An isotope in which the nucleus is not likely to break apart
- 2. A large subatomic particle with no charge
- 4. A particle of matter that is smaller than an atom
- 5. An electrical property of matter
- 7. A substance made up of only one type of atom
- 11. The central part of an atom, with an overall positive charge
- 12. An atom or molecule with a net charge
- 13. An atom or molecule with a net negative charge
- 14. A very small subatomic particle with negative charge