Across
- 4. Grey mass in the sky, made up of very small floating drops of water
- 5. It’s in the middle of the atom
- 6. Any of the four substances (earth, water, air, and fire)
- 7. Heavy and positively charged particle
- 8. Negative ion
- 9. Positive ion
Down
- 1. Not supporting or helping either side in a conflict
- 2. An arithmetical value like 4
- 3. Tiny and negatively charged particle
- 5. Heavy and neutral particle
- 8. A group of them bonded together is a molecule