What is the charge of the phosphate ion?

Phosphate is an essential polyatomic ion with a charge of -3, resulting from the phosphorus atom forming five covalent bonds. This ion plays a critical role in biological systems, as it is a key component of DNA, RNA, and ATP—the energy currency of cells. Phosphate ions are vital for cellular metabolism, energy transfer, and genetic information storage. Additionally, they are commonly found in fertilizers to enhance plant growth and development.