Across
- 4. small number behind an element
- 6. sharp,acid,oxygen
- 8. Composed of two or more elements throughout
- 9. Composed of same atom throughout
- 10. mass
- 11. big number in front of chemical formula
- 12. iron
Down
- 1. A sheet of information of all elements
- 2. smallest unit of an element
- 3. the entire chemical symbol
- 5. dealing with chemistry
- 7. person who writes scripts