It would be 2) two atoms exchange electrons and become ions
Answer:
α-amino group
Explanation:
The α-amino group on the hemoglobin binds with the CO2 and this action causes a conformational change in the structure of hemoglobin that ultimately causes the release of linked oxygen. When CO2 is binded to the hemoglobin the whole complex is termed as carbamino-hemoglobin.
I believe its coal i hope this helped
