The compound with the formula K2SO3 is called Potassium Sulfite.
In this compound, each potassium (K) atom has a +1 charge, and the sulfite (SO3) ion has a -2 charge. Since there are two potassium ions needed to balance the charge of one sulfite ion, the formula reflects this ratio, leading to K2SO3. Potassium sulfite is commonly used in various applications, including as a food preservative and in water treatment processes.