WAEC - Chemistry (2000 - No. 2)
Chlorine atom forms \(Cl^{-}\) by
losing one electron
Sharing one electron
Donating lone pair of electrons
Gaining one electron
Explicação
All non-metals will gain electron(s) to become negatively charge unlike metals which lose electron(s) to become positively charged. Chlorine atom is a non-metal in group VII, once it gains an electron to have its outermost shell completely filled with electrons, thus becoming negatively charged. The correct answer is option D