Across
- 6. the least common element on earth
- 7. the smallest planet in our orbit
- 8. the cheapest element on the periodic table
- 9. the planet not considered a planet
- 11. round planet mostly covered in water
- 13. a planet with a ring around it
Down
- 1. biggest planet in our orbit
- 2. A positively charged subatomic particle located in the nucleus
- 3. A group of atoms held together by chemical forces
- 4. the most expensive element on the periodic table
- 5. a substance that cannot be broken down into simpler substances by chemical means
- 10. the most used element on the periodic table
- 12. a mixture or solution
- 14. the least used element on the periodic table