Potassium (K)
Atomic Number: 19
Atomic Weight: 39.09
Melting Point: 63.65
Boiling Point: 774
Specific Gravity: 0.862
Valences: 1
Potassium was discovered by Davy in 1807. Potassium is commercially obtained from potash.
Potassium is never found free in nature, and its compounds are very important. This element is
essential to plant growth, so it is always found in plant fertilizers. Humans can obtain potassium,
which is necessary in a healthy diet, by eating bananas.
[LM]
{RW}
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