The was located in the Plains states (Oklahoma, Kansas, Parts of Texas, New Mexico, Colorado, and Nebraska.

answer; native americans who sometimes actively impeded railroad construction; physical obstacles like rivers and canyons, and

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.