Mineral compounds are made of elements such as sulphur, phosphorus, iron, potassium, sodium, and calcium.

无机化合物是由诸如硫、磷、铁、钾、钠和钙等元素组成。

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Since all forms of potassium alum are soluble in water, when the stone is wet or applied to wet skin, an invisible, fine layer of the mineral is rubbed off the stone and applied to the skins surface.

因为各种状态的钾明矾都能溶于水，当把它弄湿或接触湿皮肤时，会有一层肉眼看不见的细腻矿物层从钾明矾表面脱落，吸附到皮肤表面。

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Answer: C. Potassium, a mineral found in fruits, vegetables, leafy greens, legumes, and dairy products, helps reduce the rise in blood pressure caused by high-sodium foods.

答案：C。 钾，在水果，蔬菜，绿叶蔬菜，豆类和奶制品中都能找到，帮助降低由于钠摄入过量升高的血压。

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Jake Matijevic was found to be high in elements consistent with the mineral feldspar, such as sodium and potassium, and low in elements such as magnesium and iron.

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The mineral can interact with some medications, and high potassium levels may adversely affect people with damaged kidneys.

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