A chemical change took place. The lithium was dissolved by the water. Dissolved gases were released. Water was vaporized.
I gave my students this multiple choice question: A scientist placed a sample of lithium into a container of water. The scientist observed the lithium floating and making a buzzing sound as gas bubbles were forming around it. Which conclusion is best supported by this observation?

Only one answer is correct among these 4 choices:
- A chemical change took place.
- The lithium was dissolved by the water.
- Dissolved gases were released.
- Water was vaporized.

Could you tell me which one is correct?

A chemical change took place.