p4+ and lead
Nitrogen and N3-
Chlorine and CI-
Oxygen and O2-
Sodium and Na+
Arsenic and AS5+
Flourine and F-
Beryllium and Be2+
Arsenic and As3-
Nickel and Ni3-
Cadmium and Cd2+
Strontium and Sr2+
Iron and Fe3+
in electron config?