The compound that contains lead(II) ion is lead(II) nitrate, which has the chemical formula Pb(NO3)2. Lead(II) ion has a charge of +2 and is formed when lead loses two of its valence electrons. In lead(II) nitrate, the lead(II) ion is bonded to two nitrate ions, each of which has a charge of -1. This results in a neutral compound with the overall formula Pb(NO3)2.