http://www.qrg.northwestern.edu/projects/vss/docs/propulsion/1-what-is-an-ion.html
Examples of ions are as follows:
hydrogen ion is H^+. H atom lost 1 electron.
chloride ion is Cl^-. Chlorine atom (Cl) gained 1 electron.
oxide ion is O^2-. Oxygen atom (O) gained 2 electrons.
sulfate ion is [SO4]^2-
phosphate ion is [PO4]^3-
what is an ion? in chemistry
1 answer