3. suggest two reasons why the diving bell needs to be supplied with compressed air from the surface 2a. pressure increases with ocean depth, what effect does this have on the diving bell

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.