Example: 13Al J 2, 8, 3 ; 13A13+ J 2, 8
Group VIA elements try to gain two electrons into the valence shells
of their atoms during the chemical changes and form corresponding
negative anions which get octet in their outer shells.
Example: 8O J 2, 6 ;
8O2– J 2, 8
Group VIIA elements try to gain one electron into the valence shells
of their atoms during the chemical changes and form corresponding
uni– anions which get octet in their outer shells.
Example: 9
F J 2, 7 ; 9F– J 2, 8
Group VIIIA elements, the noble gases do not try to lose or gain
electrons. Generally, helium and neon do not participate in chemical
changes. Even other elements of VIIIA do not gain or lose electrons from
their atoms when they participate in a very few chemical changes.
Example: 10Ne J 2, 8 ; No electron gain or loss from the neon
atom.
