Why many cities have become tourists attraction?

Many cities have become a place of interest where tourists visit because the cities are typically known for the exhibited natural or cultural value, historical significance, natural or built beauty, or geographical location

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.

the answer is the last option or letter d)