As a subject matter expert in the field of chemistry, I can provide clarity on the charge of potassium ions. Potassium, when in its atomic form, is neutral. However, when it becomes an ion, it is typically a positively charged ion, known as a potassium cation, with the chemical symbol K⁺. read more >>

If you are alert, you notice that both the sodium and the potassium ions are positive. Neurons actually have a pretty strong negative charge inside them, in contrast to a positive charge outside. This is due to other molecules called anions. They are negatively charged, but are way too big to leave through any channel.read more >>