For Every three sodium ions that get pumped out of the cell, two potassium ions get pumped into the cell. One phosphate group is still bound to the pump.
Na+/K+-ATPase (proper name sodium-potassium adenosine triphosphatase, also known as the Na+/K+ pump, sodium-potassium pump, or simply sodium pump, for short) is an enzyme found in the plasma membrane. It moves Na+ (sodium) ions out of the cell and replaces them with K+ (potassium) ions. This keeps the Na+ ions outside of the cell membrane, and keeps the K+ ions on the inside of the cell membrane. The process works in the opposite direction of diffusion.