do u no that when an atom gains electrons it also gains a charge? hope so...this could get long. but neways. if an atom, lets say oxygen, with 6 valence electrons bonds with Lithium, which has 2 valence electrons, then they both will hav complete outer shells. the ionic charge is created when these atoms gain or lose valence electrons. since the oxygen atom gained 2 electrons, it has a charge on -2. (electrons are negatively charged particles) Lithium, a metal (all metals give away electrons) loses 2 electrons, so it has a charge of 2+. and that is how the valence electrons and ionic charge are related.
oh. if u want to figure out the charge of an atom, simply find out if its a metal or nonmetal. if its a metal, see how many valence electrons it gives away. how ever many that is, is your charge...after u add a + sign. if the atom is a nonmetal, the charge is -. so find the valence electrons and c how many it needs to gain for a full outer energy level. the number, with a - sign is the charge. so anything in group 16 has a charge of -2...they all need 2 electrons. nething in group 2 has a charge of 2+ cause they all lose 2 electrons.
srry so long and boring and confusing.
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