Quarks are the reason protons have a positive charge. Each quark has a fraction of an electric charge. A proton has two up ...

A potassium blood test is used to measure the amount of potassium in your blood. It is part of a panel of blood tests called a basic metabolic panel (BMP) that measures different substances in your ...

One of the many benefits of eating fruit is getting plenty of potassium, a mineral important for health and normal functioning. Potassium is an electrolyte that plays a role in hydration and fluid ...