What substance is oxidized as the battery discharges?

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

Fossil fuels are organic compounds that are made from

This statement about matter and its behavior is best classified as a