Across
- 4. What is found in the periodic table?
- 6. What is the sub-atomic particle with a positive charge?
- 7. What is the element with the symbol H?
Down
- 1. What is the sub-atomic particle with a negative charge?
- 2. What is the sub-atomic particle with a neutral charge?
- 3. What are columns called in the Periodic Table?
- 5. Which gas makes up most of our air?