Final answer:
The species sodium formate is represented as HCOONa, where a sodium cation (Na+) is bonded to a formate anion (HCOO-).
Step-by-step explanation:
The species sodium formate is denoted as HCOONa. It is the sodium salt of formic acid and it consists of a sodium cation (Na+) bonded to a formate anion (HCOO-). The formate anion is the deprotonated form of formic acid (HCOOH), where one of its hydrogen atoms is replaced by a sodium atom, thus carrying a negative charge to maintain overall neutrality of the species. In drawing the structure of sodium formate, the HCOO- group is typically shown with the negative charge on the oxygen, and the Na+ is placed next to this group to indicate the ionic bond between them.