Define Potassium with example.

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Potassium is a mineral essential to maintain proper health.
On the periodic table of the elements, potassium has the atomic number of 19 and atomic symbol of K.
It is a soft metal that can easily be cut by a knife.
Potassium is one of the most highly reactive metals and rarely used alone.Combined with many other elements, such as sodium or chloride, however, it forms compounds which can be found in many common items such as glass, soap, and fertilizer.
Potassium is probably best known as an important nutrient.
It can be found in a variety of foods.

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