Wнιcн parт oғ тнe eхaмple repreѕenтѕ heat

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.

grav forces affect all objects magnetic forces affect magnetic objects and electric currents