What is the ground-state electron configuration of the oxide ion o2−?

Answer : The ground-state electronic configuration of oxide ion is,

Explanation :

Electronic configuration : It is defined as the distribution of electrons of atom in an atomic orbital.

Oxygen

The total number electrons in oxygen = 6

The electronic configuration of oxygen is,

Oxide ion

The total number electrons in oxide ion, = 6 + 2 = 8

The charge on O is (-2). So, we are adding 2 electrons.

The electronic configuration of oxide ion is,

mechanics (greek   is that area of science concerned with the behaviour of physical bodies when subjected to forces or displacements, and the subsequent effects of the bodies on their environment. the scientific discipline has its origins in ancient greece with the writings of aristotle and archimedes[1][2][3] (see history of classical mechanics and timeline of classical mechanics). during the early modern period, scientists such as galileo, kepler, and newton laid the foundation for what is now known as classical mechanics. it is a branch of classical physics that deals with particles that are either at rest or are moving with velocities significantly less than the speed of light. it can also be defined as a branch of science which deals with the motion of and forces on objects. the field is yet less widely understood in terms of quantum theory.

explanation:

they both have a y in them