For every one potassium we find on the outside, we have 26 potassiums on the inside of the resting membrane of our neuron. Now, this picture doesn't actually describe everything correctly because we also have other ions that bear a negative charge. So we also have chloride ions, we have bicarbonate, and we have proteins that all have negative charge and they're found on the inside as well as on the outside of the cell. Now, we're going to begin by assuming something called electroneutrality. So electroneutrality means that all the negative charges cancel out all the positive charges on the inside, and likewise all the negative charges of all the negatively charged ions cancel out all the positive charges of all the positively charged ions. So this is known as electron neutrality.