* NA PD likely refers to a negatively charged species, as "PD" is not a common chemical symbol. Let's assume it's an anion like a phosphate group (PO4^3-).

* Adding two electrons would make the species more negative.

* Adding one proton (H+) would neutralize one unit of negative charge.

Therefore, the final molecule would be:

PO4^3- + 2e- + H+ -> HPO4^2-

Explanation:

* The phosphate ion (PO4^3-) gains two electrons, becoming PO4^5-.

* Then, the addition of a proton (H+) neutralizes one of those negative charges, resulting in the hydrogen phosphate ion (HPO4^2-).

Important Note: This explanation relies on the assumption that "NA PD" represents a phosphate anion. If it represents a different chemical species, the final molecule will be different. Please provide more context or clarify the original molecule if this isn't accurate.