What are some physical features that probably shaped migration routes in europe?

It was the rivers that probably shaped migration routes in Europe. Thus, Rivers are very navigable in Europe that’s why many people have settled along these rivers. Additionally, it is the Alps that have provided a natural barrier and provided a wall between the Italian Peninsula and the rest of Europe.

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.