Across
- 4. An element that smells like rotten egg.
- 6. A gas that makes up 78% of the Earth's atmosphere
- 7. An element with the atomic number of 81.
- 9. Finish the sentence:" we use____ to test a leaf for starch."
- 10. An element that Marie Curie discovers that would also eventually kill her :(
Down
- 1. The only element that is named after a fictional planet.
- 2. An element with the chemical symbol of Sr.
- 3. The first element in the halogens group.
- 5. A gas that will make your voice go higher.
- 8. An element that help plants to grow faster.