Answer:
Group 5
Step-by-step explanation:
Electrons are negative. All atoms want an outer shell of 8
In group 5, the atom has 5 electrons in the outer shell, due to this, the atom will gain 3 electrons, giving it a charge of -3.
This is the most negatively charged possible for any group. Due to group 5 being further left than 6, the elements there are more reactive, meaning they are more likelt to gain electrons.
Hope this helps! :-)