Answer:
An oxygen atom will gain electrons in order to achieve the electron configuration of the noble gas at the end of its period, which is neon. The electron configuration of a neutral oxygen atom is 1s(2)2s(2)2p(4). The electron configuration of the noble gas neon is 1s(2)2s(2)2p(6)
. An oxygen atom must gain two electrons in order to obtain the noble gas configuration of neon, with an octet of valence electrons. The resulting oxide ion has a charge of
2− , and its formula is O2− .
Step-by-step explanation: