Final answer:
The resting potential of Na+ is typically around -70 mV, established by the balance of ionic movements across the cell membrane and the activity of the sodium-potassium pump.
Step-by-step explanation:
The resting potential of Na+ (sodium ions) is a key concept in understanding the electrical properties of cells, particularly neurons. The resting membrane potential is the electrical charge difference across the cell membrane when the cell is not actively sending signals. It is primarily established by the sodium-potassium pump which actively transports K+ ions into the cell while pumping Na+ ions out, creating a charge imbalance. Additionally, leakage channels allow some Na+ to enter and some K+ to exit the cell. This balance of ionic movements results in a typical resting potential commonly measured around -70 mV, although the exact value can vary slightly among different types of cells.