Which lines are parallel to the equator

Latitude lines are lines that run parallel to the equator. You could also consider the Tropic of Cancer and the Tropic of Capricorn which are both 23.5° north and south of the equator respectively.

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.