Across
- 4. alkali metal
- 6. the first element
- 7. everything
- 8. a type of gas that is colorless at room temperature
- 11. the first alkali metal element
Down
- 1. tne 4th element
- 2. something to put off fire
- 3. the element with atomic weight of 10.811
- 5. a table with 118 elements
- 9. LI
- 10. noble gas #1