1. What did John Dalton and his colleagues discover when they boiled water?
2. Which two gases were produced from water when energy was added with a battery?
What properties did Dalton use to identify the gases?
What did Dalton propose water particles were made of in his model?
What did scientists call the process of atoms rearranging to form new substances?
Why was the discovery that mass stayed the same in a closed system important?
How did Dalton’s idea about water molecules change over time?
What evidence supported the idea that water has two hydrogen atoms and one oxygen atom?
What do scientists mean when they say atoms cannot be divided or destroyed in a chemical reaction?
If only a few types of atoms exist, how can so many substances exist in the world?
What does the word “compound” mean as used in the article?
According to the article, how many different types of atoms (elements) had scientists discovered by the end of Dalton’s life?