WAEC - Chemistry (1996 - No. 2)
When an atom gains an electron, it becomes
chemically inactive
negatively charged
oxidized
a cation
a complex ion
Explication
When atom gains an electron, the number of electrons increases by one and it is more than number of proton. Thus, it becomes negatively charged, indicating that there are now more electrons in the atom than proton, since electrons are negatively charged.