Why do you believe Scientists and Historians study the history of Earth? (why is that important)

To me. A reason why they both study it is because they have some common goal. They want to know more about the past and about the world. It's important that they do so because we can learn more about ourselves and how to make the world the a better place for people and for all living things around us. Hope this answer was okay

because they need to learn more

Explanation:

so they can answer are question

because the two particles have an equal charge, the charges will cancel out and give the atom an overall charge of 0. so, if at atom has 35 protons in the nucleus, we could expect it to have 35 electrons orbiting that nucleus.