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Isotopic enrichment (%)
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Atomic Number: 19
Atomic Weight: 39.0983
Melting Point: 336.53 K (63.38°C or 146.08°F)
Boiling Point: 1032 K (759°C or 1398°F)
Density: 0.89 grams per cubic centimeter
Phase at Room Temperature: Solid
Element Classification: Metal
Period Number: 4
Group Number: 1
Group Name: Alkali Metal
Although Potassium only has two stable isotopes (K-39 and K-41), the long-lived radioisotope K-40 is often also regarded as a stable isotope. Potassium isotopes, mainly K-40 and K-41, are used to study the impact of potassium on the growth of plants and of the human cardiovascular system.
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