White phosphorus, Highly reactive, toxic, glows in the dark, Red phosphorus, Stable form used in matchboxes, Black phosphorus, Most stable form with semiconductor properties, Bones and teeth, Contain about 85% of the body's phosphorus, Phosphates, Main forms of phosphorus in nature and fertilizers, Phosphorus deficiency, Weak bones, fatigue, poor appetite, Hennig Brand, First discovered phosphorus in 1669.

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