Question

Consider a neutral object. If this object becomes positively charged, does it increase, decrease
or stay the same in mass? Explain your reasoning

Answer 1

For practical purposes the weight of an electron is negligible, something like 9 X 10E-31Kg. They don't change the weight of an object enough to notice. The positive charge is usually the lack of electrons. So a positive charged object weight is not affected significantly by the loss of electrons.

Answer 2

It decreases in mass, as when it's positively charged it looses electrons (when things are charged, electrons move, not protons). Electrons weigh very little (1/1850 of the mass of a proton), but they do have mass