Across
- 2. found widely in nature-rocks, coral reefs
- 4. family 1A
- 5. group 6A
- 6. family 5A
- 7. found in nature combined with other elements
- 8. designer of the periodic table
- 10. side the metals are on
Down
- 1. form compounds with oxygen called "oxides"
- 3. family 4A
- 9. these are often used for things that are too small or too large to be observed or that are too difficult to be understood easily