A small sphere of mass 1kg and charge 1nC slides down from the top of a smooth surface of a large sphere of radius 1m and charge 1C. At what angle measured from the vertical does the little sphere leave the big sphere?

Iwould think it is temperature, silica, oxides (gases)

In atoms, the electron carries a negative elementary or unit charge; the proton carries a positive charge. the two types of charge are equal and opposite. in an atom of matter, an electrical charge occurs whenever the number of protons in the nucleus differs from the number of electrons surrounding that nucleus.