Phosphate in Nucleic acids

1. From the figure, it is observable that there are two atoms in a phosphate group i.e, P-Phosphorus and O-oxygen. 
2. So,a phosphate group an ion like compound in which phosphorus atom is bounded to four oxygen atoms. 
3. The phosphate group is added to the sugar as phosphoric acid.
4. Along with sugars and bases, it makes up nucleic acids, like DNA and RNA. 
5. As part of energy carriers, like ATP, it provides energy for moving our muscles.