Here's a breakdown:

* Na: Sodium (a metal element)

* C₂H₃O₂: Acetate (a polyatomic ion consisting of two carbon atoms, three hydrogen atoms, and two oxygen atoms)

Sodium acetate is a white, crystalline solid that is commonly used in:

* Buffer solutions: It helps to maintain a stable pH level.

* Food additive: It's used as a flavor enhancer and preservative (E262).

* Heating pads: It absorbs heat when it dissolves in water and releases heat when it crystallizes, providing a source of warmth.

* Chemical synthesis: It's used as a reagent in various chemical reactions.

Let me know if you'd like to know more about its properties or uses!