Across
- 2. Used to make smartphone screens
- 3. Smallest ordinary matter that forms an element
- 7. In liquid form, extremely cold, also the most abundant gas
- 8. Example-water
- 9. Example-steam
Down
- 1. The most valuable element,highly explosive
- 4. A gas we need for respiration
- 5. 2 or more atoms bonded together
- 6. Example-ice