Is oxygen incorparated into the hemoglobin to bring it cells a chemical change?

Yes, the incorporation of oxygen into hemoglobin to transport it to cells is a chemical change. When hemoglobin binds to oxygen, it undergoes a conformational change, causing the molecule to change shape and structure. This change in structure allows hemoglobin to bind to oxygen more tightly and efficiently. Additionally, the binding of oxygen to hemoglobin changes the molecule's color from a bluish-red to a bright red, which is why oxygenated blood appears brighter red than deoxygenated blood.