GENERAL KNOWLEDGE

Detailed explanation-1: -Answer. Answer: Therefore the O electron configuration will be 1s22s22p4.

Detailed explanation-2: -Hence, the given electronic configuration is of Neon.

Detailed explanation-3: -Oxygen, for example, has the electron configuration 1s22s22p4, whereas the oxygen anion has the electron configuration of the noble gas neon (Ne), 1s22s22p6.

Detailed explanation-4: -Thus, the electron configuration for a P3– ion is 1s22s22p63s23p6.

Detailed explanation-5: -For the given electron configuration, the valence shell would be the 4th energy level which include the 4s orbital. Thus, it only has two valence electrons since the 4s orbital has 2 electrons.