Hemoglobin binds best to oxygen at:.

Hemoglobin is a protein that has four subunits, two beta and two alpha, which is where it binds with oxygen.

The more places occupied by oxygen it has, that is, the more oxidized it is, the faster these four binding sites will be saturated with oxygen.

Like all proteins, the affinity of the union with its substrate, that is, oxygen, depends on the pH of the medium, that is why hemoglobin for better assimilation will have to be subjected to a pH of 7

Explanation:

In addition, a positive factor to take into account so that it associates and has a better affinity with oxygen is the partial pressure of the gas in the inhaled atmosphere, that is, the higher the oxygen in the inhaled atmospheric pressure, the greater the affinity it will have for the oxygen. Once the 4 oxidized subunits have been reached, this protein is considered saturated and cannot be associated with more than 4 oxygen.

atomic number of carbon is 6

electronic configuration of carbon is 1s²2s²2p²

orbital diagram of carbon is as shown here in the image.