This is going to be a review so I would really really appreciate someone to give me proper answers

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?

What are some natural measures of time

Na chemical reaction, activation energy increases the of the reactants. this outcome causes the particles to collide, which results in the of new products.