How did the development of the earliest idea about atoms differ from the later work of scientists?

At first, atoms were considered to be very simple and indivisible. People form ancient times knew only of water, earth, fire, and air, not what constitutes them or how they work specifically. Now, there are 118 elements and all atoms are proven to consist of neutrons, protons, and electrons, and that's just the beginning of it.

You can still be friends with each other. you don't have to date since he likes someone else. just stick to being friends for now

The velocity would be 2