How many countries are in the world?

There is a total of 195 countries.

193 are members of the United Nations and 2 are non-member-which are Palestine and the Holy see.

Hope this helps! :)

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.