A student lifts a brick weighing 22 , slowly and at constant speed, from the ground to 2.0 height. How much work did the gravitational force do on the brick?

an ion is a charged atom or molecule. it is charged because the number of electrons do not equal the number of protons in the atom or molecule. an atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.