If both bond lengths are the same, how can you choose two O atoms to be the central ones?

I can rationalize, saying you are imagining a certain stage in a reaction where one O atom approaches an O2 molecule.

The O atom in the center position of O3 has two single bonds.

Similarly, when water vapor condenses, heavier water molecules holding O atoms tend to condense and precipitate first.

The removal rate is slow, since the concentration of O atoms is very low.

O atoms, for example, lose their first electron when they absorb 1314 kJ/mol of energy.

In this very formal depiction, negative charge is localized on the O atoms of the single P-O bonds.

You know that under the surface is a lattice of Si atoms linked by O atoms.

It is even possible to have a surface that has O atoms only.

Rather, the electronegativity of the central atom (E) and the number of O atoms determine oxoacid acidity.