periodic table
Across
- 3. what is on the second row and second column
- 4. what do plants create using photosynthesis
- 7. What is the element after potassium
- 11. what was founded by James W. Marshall
- 12. what is needed by all living tissue
- 15. what is the third most abundant gas in earth atmosphere
- 16. what element has the atomic mass of 35.45
- 17. what is 2/3 the density of air
- 18. what is the lightest element
- 19. what element can be found inside soil, plant,food, and water
- 20. what is the lightest halogen to exist
Down
- 1. what has the atomic number of 30
- 2. what is the five cent coin
- 5. what element has the symbol N
- 6. what the symbol Li on the periodic table for
- 8. what is the second most abundant element in the crust
- 9. what is the first element in group 6
- 10. what were the coins made out of in the 8000 B.C.E
- 13. what is tableware made out of?
- 14. what are springs made out of