Question

Electronic configuration of X-2 resembles the configuration of Neon atom. I
dentify the element. a. Oxygen b. Oxide o c. Sulphur d. Sulphide​

Answer 1

$\sf {X }^{ - 2} \: \: \: is \: \: \: the \: \: \: given \: \: \: \: e.c$

it resembles like neon . so, it is Oxygen