Across
- 3. the smallest unit of matter?
- 5. horizontal rows
- 9. stable subatomic particle with a charge of negative electricity
- 10. A positive ion known as?
Down
- 1. Vertical columns
- 2. the number of neutrons and protons in the nucleus of an atom
- 4. loose electrons during a chemical reaction
- 6. Electrons orbit the nucleus of an atom in?
- 7. A negative ion is known as?
- 8. The number of protons in an atom